Its 1am in Boston (I'm on a road-trip having some excellent discussions with reviewers and analysts) and I thought I'd share with everyone an important document that describes the decision points you should go through when selecting which of the 3 workflow alternatives you have with BizTalk Server 2004. This document also includes roadmap implications of your choices. Grab it and read it here.
P.S. I've seen the final "pdfs" for the book and 11/5 - 11/9 is looking really good. I can't wait.