You have to meet the Height Requirement to Ride in the Enterprise: There's no doubt that businesses are talking to Google, and hearing their pitch, but despite all the talk, Google can't avoid the fact that often times they cannot meet basic requirements.
-- Tom Rizzo, Senior Microsoft Online Services in his blog post on the Decemer 2010 decision of the General Services Administration to replace several different versions of IBM's Lotus Notes and Domino software with Google for its email.