If you do any development and happen to be a student you GOTTA check out Microsoft's DreamSpark program! As per the DreamSpark site:
DreamSpark is simple: Its about giving students Microsoft professional tools at no charge.
Students get full versions of Visual Studio 2010 Pro (Or 2008 Pro), Windows Server 2008 or 2008 R2, Expression Studio 4 ultimate and lots more (Sql Server, Game Studio). I would say its worth enrolling in a few classes just to get download privileges to this site!