Several cool BizTalk-related news reported today:

• The new BizTalk 2006 developer's Troubleshooting Guide released, as reported here, here, here and here. Fantastic work on the part of BizTalk's Documentation Team putting this together. I've turned my copy into a slightly smaller PDF file I can keep around for constant reference!
• Managing a Successful Performance Lab for BizTalk Server document released.
• New blog on the Business Rules Engine (BRE) in BizTalk, by Sreedhar Pelluru. Lots of good stuff already.
• KB 834624: List of Known issues in BizTalk Server 2004. You never know when you're gonna hit one of those.