"...wikis have quietly permeated the fabric of [U.S.] government IT."

Includes case studies involving the General Services Agency, Central Intelligence Agency, CIO Council and others.

Unfavourably contrasts wikis with proprietary software such as Lotus Notes. Claims the latter "...could prevent casual or cross-agency collaboration. Plus the training requirement is huge,.."

More: http://www.gcn.com/print/25_25/41673-1.html