C:\Program Files\ProClarity\ProClarity Dashboard Server\Nice article on SQL 2008 (Katmai) New Features:

http://blogs.mssqltips.com/blogs/chadboyd/archive/2007/10/15/katmai-sql-2008-the-list-of-new-features.aspx

 

I have attached a PowerPoint file that has a listing of all the new features from the public SQL Server Connect site.  You can download it from there.