I realize that this thread is old, but that's all I get from my search.
We are also using Telerik's Sitefinity CMS. It turned out that the long awaited version 4 did not even have the very basic forums module from v3.7, so we need to get going with dedicated forum software.
From this thread, did you end up with some code for Sitefinity integration the last time?
When we first started moving to Sitefinity two years ago we had a company web that we set up in Visual Studio, that embedded YetAnotherForum.Net. While the latter might have been sufficient I would rather not go back to an unsupported system.
We chose Sitefinity to have user management common to the CMS and forums, and likewise to have built-in support for searching across all items. My bad, I did not check the forums module properly before purchasing. (otherwise very pleased with the abilities of Sitefinity)
Sitefinity fully supports the ASP.NET membership system, letting me configure a different membership provider. Could that be used with ASPPlayground.NET for a SSO, one way or the other?
Also, is it possible to embed ASPPlayground.NET in a .ascx UserControl? (to be used in Sitefinity)
Thanks, will choose as soon as possible.