And Geoff Ralston reports that 6 of 30 in the education category did Imagine K12, which is all the more impressive since that category includes nonprofits as well.
The Muse (themuse.com) did YC W '12 and was Forbes 30-under-30 in Media, plus also Amicus in Social Entrepreneurship, and Mixpanel, tracks.by and Emmett Shear in Games & Apps. Way to represent