Via the ever-wonderful BCIG mailing list I got notice of this very interesting Web 2.0 initiative at NIH, which is exploring the application of those technologies at that revered (around here, anyway) agency. There's an open discussion session being held on September 25th at the NIH's Rockledge campus, and you can see the notes from yesterday's session here.
We're already using wikis and other Web 2.0 technologies at other clients, and they really do shorten document and concept development times. Their application is also proven through things like the Knowledge Services Network at the FAA. What are you doing with Web 2.0 at your agencies?