WPF/SL Community Sites

1. The MSDN Silverlight Community site – If you get stuck with Silveright this is the place to go to ask questions and get answers, most often time from Microsoft developers themselves! 
http://msdn2.microsoft.com/en-us/silverlight/bb187454.aspx

2. The Silverlight Forums – More Silverlight forums to help you solve your Silverlight issues
http://silverlight.net/forums/

3. The MSDN WPF Forums – Forums dedicated to everything WPF
http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=119&SiteID=1

4. WPFWiki – Blend forums
http://expressionblend.com/forums/default.aspx

5. MSDN Visual Studio Setup and Installation – If you are having trouble installing Visual Studio check this site out
http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=26&SiteID=1