MSDN "Roslyn" Dev Center http://go.microsoft.com/fwlink/?LinkID=228399
Microsoft “Roslyn” CTP http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27746
Walkthroughs: Microsoft "Roslyn" CTP http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27745
The Roslyn Project - Exposing the C# and VB compiler’s code analysis, October 2011 http://msdn.microsoft.com/en-us/hh500769
[docx] Whitepaper: Roslyn Project Overview http://www.microsoft.com/download/en/details.aspx?id=27744
Forum http://social.msdn.microsoft.com/forums/en-us/roslyn
Known Limitations and Unimplemented Language Features: http://social.msdn.microsoft.com/Forums/en-US/roslyn/thread/f5adeaf0-49d0-42dc-861b-0f6ffd731825
Blogs on Roslyn CTP:
S. Somasegar http://blogs.msdn.com/b/somasegar/archive/2011/10/19/roslyn-ctp-available-now.aspx
Eric Lippert http://blogs.msdn.com/b/ericlippert/archive/2011/10/19/the-roslyn-preview-is-now-available.aspx
VS Team http://blogs.msdn.com/b/visualstudio/archive/2011/10/19/introducing-the-microsoft-roslyn-ctp.aspx
C# Team http://blogs.msdn.com/b/csharpfaq/archive/2011/10/19/introducing-the-microsoft-roslyn-ctp.aspx
VB Team http://blogs.msdn.com/b/vbteam/archive/2011/10/19/introducing-the-microsoft-roslyn-ctp.aspx