Just found out about an interesting game called Herd It. Tried it out and, presented in a kind of "brain trainer like" user interface, this facebook game tests your abilities to tag and name songs. Questions like "how do you classify this song", "would this song be good for a romantic date" are asked to the user after listening to songs. Punctuation is given based on the tags that are chosen by majority of the current 10 players.
A great idea! Here's to hoping they will release the actual data.