In a move that shows collaborative software is really hitting the mainstream, the city of Los Angeles is dropping MS Office in favour of Google Docs (with many native collaboration features). The beautiful irony is that the 7.2 million dollars they are spending on the project comes from an anti-trust lawsuit settled against Microsoft in 2006.
http://tech.slashdot.org/story/09/10/29/1211236/Los-Angeles-Goes-Google-Apps-With-Microsoft-Cash