Guesses: 6 million users, 1 million paid, 2012 revs between $60-100m.
Microsoft has done some good investments and acquisitions in the past, and also some duds. The jury is still out on Skype.
http://en.wikipedia.org/wiki/List_of_mergers_and_acquisition...
Guesses: 6 million users, 1 million paid, 2012 revs between $60-100m.