April 27, 2008 Update: I've submitted a new bug report that provides a cleaner solution for reproduction. I've also determined that the issue is not with AppDomain.AssemblyResolve but actually appears to be a problem with Type.GetType when invoked in VS 2008's process.
https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=340664
Multiple Visual Studio 2008 projects that serve to illustrate an AppDomain.AssemblyResolve event bug that I reported back in August. Read more about it in my blog: DocProject 2008 Beta 2 - AssemblyResolve Showstopper.
DISCLAIMER: Use at your own risk!
AppDomain.AssemblyResolve Bug