I'm listening to Joseph Chiusano from Booz Allen Hamilton talk about GXA specifications, about which I've written a considerable amount. Joseph has been very active on this front and contains a lot of useful reference to how these specifications might be used to enhance eGovernment. I'm hoping I can get a URL to his presentation. Here are a few summary quotes:
GXA is poised to play a major role in advancing the adoption of web services through its robust specification of mechanism for web services such as security, policy, coordination, federation, and routing
Several GXA specifications (WS-Transaction and WS-Coordination) appear to be plausible candidates for inclusion in the upcoming W3C choreography effort.