I was asked for RadEditor MVC helper, so here it goes (copy paste code out) :

        public static MvcHtmlString RadEditorFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression) where TModel : class
        {

            return RadEditorFor(htmlHelper, expression, ((IDictionary<string, object>)null));
        }

        public static MvcHtmlString RadEditorFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, object htmlAttributes) where TModel : class
        {
            return RadEditorFor(htmlHelper, expression, new RouteValueDictionary(htmlAttributes));
        }

        public static MvcHtmlString RadEditorFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, IDictionary<string, object> htmlAttributes) where TModel : class
        {
            string name = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(ExpressionHelper.GetExpressionText((LambdaExpression)expression));
            TProperty value = ExpressionHelper2.GetValue(htmlHelper, expression);
            return RadEditor(htmlHelper, name, value, htmlAttributes);
        }

        public static MvcHtmlString RadEditor(this HtmlHelper htmlHelper, string name)
        {
            return RadEditor(htmlHelper, name, null);
        }

        public static MvcHtmlString RadEditor(this HtmlHelper htmlHelper, string name, object value)
        {
            return RadEditor(htmlHelper, name, null, ((IDictionary<string, object>)null));
        }

        public static MvcHtmlString RadEditor(this HtmlHelper htmlHelper, string name, object value, object htmlAttributes)
        {
            return RadEditor(htmlHelper, name, value, new RouteValueDictionary(htmlAttributes));
        }

        public static MvcHtmlString RadEditor(this HtmlHelper htmlHelper, string name, object value, IDictionary<string, object> htmlAttributes)
        {
            if (String.IsNullOrEmpty(name))
            {
                name = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name);
                if (string.IsNullOrEmpty(name))
                {
                    throw new ArgumentException("name");
                }
            }
            if (htmlAttributes == null) htmlAttributes = new Dictionary<string, object>();
            Page page = new Page();
            RadMvcScriptManager mvcScriptManager = new RadMvcScriptManager();
            mvcScriptManager.EnableViewState = false;
            page.Controls.Add(mvcScriptManager);
            RadStyleSheetManager radStyleSheetManager = new RadStyleSheetManager();
            page.Controls.Add(radStyleSheetManager);

            //string id = name.Replace(".", "_");
            RadEditor radEditor = new RadEditor();

            radEditor.ID = name + "_radeditor";
            radEditor.ClientIDMode = ClientIDMode.Static;

            radEditor.ImageManager.ContentProviderTypeName = typeof(AzureStorageFileBrowserContentProvider).AssemblyQualifiedName;
            radEditor.ImageManager.MaxUploadFileSize = 3000000;
            radEditor.ImageManager.ViewPaths = new string[] { "uploaded/images" };
            radEditor.ImageManager.UploadPaths = new string[] { "uploaded/images" };
            radEditor.ImageManager.DeletePaths = new string[] { "uploaded/images" };

            radEditor.DocumentManager.ContentProviderTypeName = typeof(AzureStorageFileBrowserContentProvider).AssemblyQualifiedName;
            radEditor.DocumentManager.MaxUploadFileSize = 20000000;
            radEditor.DocumentManager.ViewPaths = new string[] { "uploaded/documents" };
            radEditor.DocumentManager.UploadPaths = new string[] { "uploaded/documents" };
            radEditor.DocumentManager.DeletePaths = new string[] { "uploaded/documents" };

            radEditor.MediaManager.ContentProviderTypeName = typeof(AzureStorageFileBrowserContentProvider).AssemblyQualifiedName;
            radEditor.MediaManager.MaxUploadFileSize = 50000000;
            radEditor.MediaManager.ViewPaths = new string[] { "uploaded/media" };
            radEditor.MediaManager.UploadPaths = new string[] { "uploaded/media" };
            radEditor.MediaManager.DeletePaths = new string[] { "uploaded/media" };

            radEditor.FlashManager.ContentProviderTypeName = typeof(AzureStorageFileBrowserContentProvider).AssemblyQualifiedName;
            radEditor.FlashManager.MaxUploadFileSize = 50000000;
            radEditor.FlashManager.ViewPaths = new string[] { "uploaded/flash" };
            radEditor.FlashManager.UploadPaths = new string[] { "uploaded/flash" };
            radEditor.FlashManager.DeletePaths = new string[] { "uploaded/flash" };

            //radEditor.TemplateManager.ContentProviderTypeName = typeof(AzureStorageFileBrowserContentProvider).AssemblyQualifiedName;
            radEditor.TemplateManager.MaxUploadFileSize = 500000;
            radEditor.TemplateManager.ViewPaths = new string[] { "~/content/templates" };

            radEditor.NewLineBr = false;

            radEditor.Skin = "Vista";

            //radEditor.ToolsFile = "~/Content/administracija/EditorToolbar.xml";
            if (htmlAttributes.ContainsKey("ToolsFile")) radEditor.ToolsFile = htmlAttributes["ToolsFile"] as string;
            UIHintControlParameterDataAnnotationsModelMetadata mmd = (UIHintControlParameterDataAnnotationsModelMetadata)htmlHelper.ViewData.ModelMetadata;
            if (mmd.TemplateControlParameterExist("ToolBar"))
            {
                radEditor.ToolsFile = mmd.GetTemplateControlParameter<string>("ToolBar");
            }
            if (mmd.TemplateControlParameterExist("DisableHtmlFormating") && mmd.GetTemplateControlParameter<bool>("DisableHtmlFormating"))
            {
                radEditor.StripFormattingOptions = EditorStripFormattingOptions.None;
                radEditor.DisableFilter(Telerik.Web.UI.EditorFilters.ConvertToXhtml);

            }
            if (value != null) radEditor.Content = value as string;
            radEditor.DialogHandlerUrl = "/Telerik.Web.UI.DialogHandler.axd";
            page.Controls.Add(radEditor);
            StringWriter output = new StringWriter();
            HttpContext.Current.Server.Execute(page, output, false);

            return MvcHtmlString.Create(htmlHelper.Hidden("", "ToBeReplaced").ToString() + output.ToString());
        }

Some controls explicitly require to be placed within

public class NoServerFormPage: Page
        {
            public override void VerifyRenderingInServerForm(Control control)
            {
                // to avoid the server form (<form runat="server">) requirement
            }
        }
        
        public static MvcHtmlString TelerikReport(this HtmlHelper htmlHelper, object  value, object htmlAttributes )
        {
            NoServerFormPage page = new NoServerFormPage();
            RadMvcScriptManager mvcScriptManager = new RadMvcScriptManager();
            mvcScriptManager.EnableViewState = false;
            page.Controls.Add(mvcScriptManager);
            RadStyleSheetManager radStyleSheetManager = new RadStyleSheetManager();
            page.Controls.Add(radStyleSheetManager);

            ReportViewer reportViewer = new ReportViewer();
            reportViewer.ID = "whoCares";
            reportViewer.Height = 890;
            reportViewer.Width = 700;
            
            reportViewer.ToolbarVisible = true;
            reportViewer.Report = new Ntk.Reports.Racun();
            ((Telerik.Reporting.Report)reportViewer.Report).ReportParameters["ID"].Value = value;
            reportViewer.Resources.CurrentPageToolTip = "Trenutna stran";
            reportViewer.Resources.ExportButtonText = "Izvozi";
            reportViewer.Resources.ExportSelectFormatText = "Izberi format za izvoz";
            reportViewer.Resources.ExportToolTip = "Izvoz";
            reportViewer.Resources.FirstPageToolTip = "prva stran";
            reportViewer.Resources.LabelOf = "od";
            reportViewer.Resources.LastPageToolTip = "Zadnja stran";
            reportViewer.Resources.NextPageToolTip = "naslednja stran";
            reportViewer.Resources.PreviousPageToolTip = "prejšnja stran";
            reportViewer.Resources.PrintToolTip = "Natisni";
            reportViewer.Resources.ProcessingReportMessage = "Nalagam...";
            reportViewer.Resources.RefreshToolTip = "Osveži";
            

            page.Controls.Add(reportViewer);
            StringWriter output = new StringWriter();
            HttpContext.Current.Server.Execute(page, output, false);

            return MvcHtmlString.Create(output.ToString());
        }

I was configuring User Profile Service at one of our clients, and the problem was that after provisioning User Profile Service I was getting 6801 and 6803  errors in event log.

Central Administration site was using SSL, for example https://sharePointServer

Following examples at http://www.mylifeinaminute.com/2010/07/07/sharepoint-2010-user-profile-synchronization-errors/ I tried to fix things, but it didn't work for me...

So, after using ULS Viewer and miisclient (C:\Program Files\Microsoft Office Servers\14.0\Synchronization Service\UIShell\miisclient.exe) I found out that User profile service can not connect to the approprite Web Service.

What I did was, I opened up a miisClient, opened Management Agents, right clicked on MOSS{guid} Extensible connectivity, clicked on Properties and Configure Connection Information. After trying to configure the right connection, I found out that even though Central Administration site is on URL https://sharepointserver, the user profile connection instead of connecting to direct://sharepointserver/_vti_bin/ProfileImportExportService.asmx?ApplicationID=27c26eca%2D6eeb%2D4da4%2D9012%2Da51e02baae9a, I entered:https://SharePointServer.xnet.si/_vti_bin/ProfileImportExportService.asmx?ApplicationID=27c26eca%2D6eeb%2D4da4%2D9012%2Da51e02baae9a and everything started to work normaly.

I hope that helps