NewsFlash...Microsoft today announced their long-awaited entry into the Complex Event Processing market. The press release is at http://www.microsoft.com/presspass/press/2009/May09/05-11TechEd09PR.mspx.
Unfortunately, this is the only information I can find so far in the public domain, and, being a cautious kind of guy, and NDAd up the hilt, I will hold back from saying more until I can guage just how much detail Microsoft is releasing at the current time. It looks like they have a session at TechEd tomorrow on their forthcoming offering, and we are all hoping for a CTP very soon. Watch this space for more info.
In the meantime, here are a couple of Microsoft Research links that you might find interesting. I couldn't possibly say how relevant they might be ;-)
http://research.microsoft.com/apps/pubs/default.aspx?id=70517
http://middleware05.objectweb.org/WSProceedings/demos/d1_Barga.pdf