I just wanted to plug another good BizTalk resource: http://www.biztalk247.com/. Saravana Kumar has given the site an extensive facelift and it looks great!
On the site, you will find links to Blogs, installation guides, BizTalk posters, Hot News, Web Casts, tutorials and links to lastest in BizTalk books.
While I am in the plugging mood, a book that I have started to read is Richard Seroter's SOA Patterns with BizTalk Server 2009. So far I am a couple chapters in and I am impressed with it. I will post a more comprehensive review once I have completed it.