Saravana Kumar has just published the BizTalk Blog Docs site on BizTalk 24/7.
This is a really cool looking new resource which aggregated some of the popular blog articles and presents them in a structured format which is similar to the MSDN Library
http://blogdoc.biztalk247.com/default.aspx
My profile on BizTalk Blog Docs is: http://blogdoc.biztalk247.com/michael-stephenson