.Net Framework 3.5 Source Code will be released later this year!
This is incredible!
Instead of using .Net Reflector we will be able to step into the .Net framework source code using Visual Studio 2008!
This will be a great debugging advantage!
See the details here:
http://weblogs.asp.net/scottgu/archive/2007/10/03/releasing-the-source-code-for-the-net-framework-libraries.aspx
Enjoy!
Daniel.