overwhelming number of US gov Web Services / XML / EA / tech links

web-services.gov
The title on the page says Semantic (XML Web Services) Interoperability Community of Practice (SICoP)

The purpose of this CoP is to support two CIO Council Committees: (1) the Best Practices Committee's Knowledge Management Working Group and its Semantic Interoperability CoP, and (2) the Architecture and Infrastructure Committee's Emerging Technology Subcommittee in its work with the other two subcommittees (Enterprise Architecture Governance and Components) and the e-Gov Initiatives in their use of Semantic XML Web Services to demonstrate increased accessibility and interoperability. Background on CIO Council's XML Web Services Working Group (August 2002-September 2003): Brainstorming Session and Charter.

There are hundreds of links.