Seems Microsoft wants us to see their code, with comments, pretty cool: http://weblogs.asp.net/scottgu/archive/2007/10/03/releasing-the-source-code-for-the-net-framework-libraries.aspx
http://www.microsoft.com/downloads/details.aspx?familyid=69d2219f-ce82-46a5-8aec-072bd4bb955e&displaylang=en
http://www.retrospector.com/2006/06/21/top-10-ways-to-motivate-geeks/