I agree with David as well. In general the ITC sections within agencies are only enablers (or un-enablers depending on your point of view). the businesses within the agencies are the ones requesting this technology and appropriate solutions. They are usually also the people working directly with clients who request Web 2.0 services at conferences etc.
We already have a prototype application framework that will allow web 2.0 solutions for information interaction. This is more than just data delivery. There are also already connections with large projects in Europe (Inspire) and the US that are dealing with technological barriers. These are primarily interoperability projects but do have relevance here.