User Group: Steven Smith in Ann Arbor on 11/14
Steve blogs about it here: http://aspadvice.com/blogs/ssmith/archive/2007/11/02/Speaking-in-Ann-Arbor-November-14th.aspx. He'll be up in Ann Arbor, discussing ASP.NET caching and performance. I'm on a couple email lists with Steven and I know he's got a tremendous amount of information on the subject. If you do anything with ASP.NET, this is a presentation you need to see.