ESRI Doing ESB
According to an ADT Magazine article, ESRI are using the open source Mule Enterprise Service Bus (ESB) messaging framework to do some Service Oriented Architecture (SOA) work.
The remainder of this post is pure speculation:
The Mule licence is very unrestrictive so it could be embedded in a commercial product. Perhaps the “ability to work with multiple data sources” mentioned on Abstract Final is a clue. Given the number of time SOA was mentioned at OZRI I wouldn’t be surprised if the ArcGIS Server Application Developer Framework (ADF) is morphing into an enterprise framework.