Here is an info-graphic my friend turned me onto (click the image to get the full view.)
It shows the exodus from some of the biggest tech companies (facebook, yahoo, google…) that supplied the man power, and brain power, to feul various startups such as: Zoosk, Hunch, Tapjoy, Color, Foursquare, Quara and more.
Want more?
Here is an article outlining the biggest winners and losers involved:
http://blog.topprospect.com/2011/06/the-biggest-talent-losers-and-winners/