I first learned of Rap Genius in the Yale Alumni Magazine earlier this year, and...

I first learned of Rap Genius in the Yale Alumni Magazine earlier this year, and concluded that the idea was clever but the business opportunity small.[1] Now that Rap Genius is expanding its target market to general text annotation, the business opportunity looks substantial to me. Off the top of my head, I'm thinking analysis of textbooks, critiques of literary works, and commentary on the news -- the potential uses are many. Hats off to the team.

[1] http://www.yalealumnimagazine.com/issues/2012_05/feature_rap...