>Udi has published his NBus (soon to be an OSS project). I have played around with it and I really like it. Async communication is a key factor for a successful SOA so I think NBus will be a nice addition to my SOA - toolbox. It currently only supports MSMQ-transport but a WCF transport is coming ( I have implemented my own file-based transport just to test it)
Arvindra Sehmi has posted a series of posts about his "service capsule" consept that are really interesting. A service capsule is a business capability and it's corresponding communication patterns. Go and read it!