There's a lot of excitement here at TechEd about the WSE release. I got to watch Keith Ballinger's WSE Messaging talk and Benjamin Mitchell's WSE Security talk. Both talks had a full room. For some reason all the Connected Systems track presentations are in just about the smallest room at the convention center. I understand they are trying to get Benjamin's talk rescheduled.
For notes on Keith's talk, check out John Bristowe's blog entry.