Details on Direct Bound Ports
I'm currently working on a post about how the BPM scenario show-cases versioning of business processes. As part of this I looked up Kevin Lam's blog as I know that he has worked with the BizTalk Scenarios, particularly the BPM scenario. What I found was quite interesting!
Kevin has written a number of detailed articles about how direct binding works. He starts with an introduction and then dives into details about message box direct bound port, partner direct binding (including inverse direct binding), self-correlating direct bound ports and dynamic direct bound ports. At the time of this writing there are five articles, if more becomes available I will update this post.