I just finished a post at Between the Lines on the importance of the Massachusetts vs. Microsoft battle over whether Office is included in the Massachusetts enterprise architecture. Bottom line: government CIOs have had the means and motive to make such a move. Massachusetts' actions have given them the opportunity to make the same move.
On the same subject, David Berlind's comprehensive report on the process Massachusetts followed in the ETRM process should be a must read for any government CIO or IT manager.