Tim Ewald, the architect of the MSDN2 web site (still in alpha) talks about how and why it was built and points out some undocumented features, particularly in the new URL by alias scheme. The system supports URLs of the format http://msdn2.microsoft.com/library/[namespace].aspx (e.g. http://msdn2.microsoft.com/library/system.xml.serialization.aspx). [via Chris Sells]