I've been using Mike Volodarsky's patch for a while for sites that I am developing in IIS7 (no problems with file based development server) to get past debugger auto-attach problems. Now an official hotfix has been released.
[A New DevLife post]
Hotfix for ASP.NET 2.0 Debugging problems with Vista/IIS7
Thursday, June 28 2007 - ASP.NET
