Some preliminary info on the breakout sessions has been posted to the TechEd website. One that looks interesting is Ted Neward's ARC314 Passing Messages: A Flexible, Powerful and Extensible Communication Model. Here's the abstract:
"Over the last decade, focus in inter-process communication has centered on Remote Procedure Calls (RPC) and its object-oriented equivalents. In this session, we discuss the benefits of using another communication approach, messaging, to gain flexibility, scalability, and integration benefits that traditional RPC simply can't provide."
Anyone see any other compelling sessions? Let me know in the comments or drop me an email.