http://weblogs.asp.net/scottgu/archive/2007/10/03/releasing-the-source-code-for-the-net-framework-libraries.aspx (http://weblogs.asp.net/scottgu/archive/2007/10/03/releasing-the-source-code-for-the-net-framework-libraries.aspx)
Good for debugging purposes as mentioned, but this is awfully scary! Well they will obviously have some sort of control but i hope they have stated in their license that it can't be redistributed.
Why's it matter if it gets redistributed? If they're making it available, anybody can download them anyways.
Because then MONO might actually get finished. Oh the horror! :P
I don't see to much of an advantage from it anyway (apart from the role it will play in debugging). Might as well just use the .NET reflector.
It's a read-only license. No impact on Mono.