I wasn't able to attend yesterdays Webcast about "Using BizTalk 2004 to Implement an SOA for Service Provisioning" because of some problems at work but I have had time to download the slides.
I think they are really fantastic and I plan to watch the replay of the WebCast. I got some new ideas about BizTalk solutions architecture. I can recommend this to everyone interested in BizTalk solutions and I will post some ideas of mine about it later.