Well I am one of the lucky first one hundred people to attend the Quick Learn BizTalk 2004 Deep Dive training. John Callaway runs the course and has done a fantastic job putting the content together. If you can get on a course that isn't sold out I totally recommend it.
Go check out Scotts Woodgates blog for feedback from partners that have attended to date http://blogs.msdn.com/scottwoo/archive/2005/04/28/413101.aspx
http://www.quicklearn.com/deepdive.htm