I don't know though. RapGenius seems to have broken down crowd sourcing of understanding context/word meaning into very small bits. This could be absolutely huge for a machine learning input that you really cannot get with Quora or Answers.com, where the data is just not focused enough. Here it's down to the word. That's nuts and people will do the work for free. Bigger than Google? Maybe not. But bigger than pinterest, sure.
