Designing Managed Add-Ins for Reliability, Security, and Versioninghttp://blogs.msdn.com/jackg/archive/2005/10/31/487343.aspxHere is the free download from the FUN309 PDC2005 session. Here is the description from the download center " Speakers: Jim Miller; Thomas Quinn Most large applications allow customers to provide code to customize the application’s behavior. Examplesen-USCommunityServer 2.1 SP1 (Build: 61025.2)