Those of you interested in SQL Server Data Mining - there is now a newsletter that you can subscribe to.
This will keep you up to date with the latest happenings in the SQL Server Data Mining world and also gives useful tips.
SQL Server Data Mining Community Site
MSDN Forum for SQL Server Data Mining
Microsoft SQL Server 2005 Web Site
SQL Server Developer Center
Add-ins download http://go.microsoft.com/fwlink/?LinkId=82754.
Video tutorials and more http://go.microsoft.com/fwlink/?LinkID=81060.
And don't forget to check out the whitepaper and tip for trying out the add-ins on www.sqlserverdatamining.com.