I'm a little late in posting about this but there is a new BizTalk-specific "magazine" called BizTalk Hotrod: http://biztalkhotrod.com/default.aspx
The first issue was published just a few days ago.
The second Twin Cities Code Camp will occur this Saturday, April 28th. Here's the website, which includes a schedule and list of sessions: http://www.twincitiescodecamp.com/TCCC/Default.aspx
I'll be presenting on utilizing BizTalk's BAM features from non-BizTalk applications.