We had the treat tonight of having Aaron Skonnard present at our Utah .NET User Group meeting. The meeting was delayed a week so we invited the Utah County .NET User Group to attend. I was really impressed with the turnout. Getting a speaker like Aaron out sure pulls people out of the woodwork that haven't been there for a while. 
Aaron talked about BizTalk 2006 and it was great! His presentation focused on use-cases and scenarios for BizTalk and then he delved into creating schemas, maps, and pipelines. We then took the published assembly and set up the ports and subscriptions within the BizTalk environment. It sure is easier now in the 2006 timeframe than when I first did this stuff in BizTalk 2000. I kind of followed the progress of the product through the 2002, 2004, and 2006 timeframes and it sure has made great strides.
It was a great presentation and everyone had a great time.