How many employees does ___ have?

►Twitter/300+ (http://j.mp/aQEVyN) ►Facebook/1,700+ (http://j.mp/awIeY1) ►Google/20,000+ (http://j.mp/buDzb7) ... note that I made an update to Wikipedia just before posting this, which was showing 140 employees for Twitter.

Anyone have any other (current) interesting numbers?