Test TasteWeights: a Facebook music recommender system (Bonus: chance to win a Kindle Fire!) - Bart Knijnenburg - >97%, >50 HIT approved, US, 1.10

http://adf.ly/6c91g - You also need a Facebook to do this, click the link before you accept the HIT just in case you aren't eligible. Also apparently you can enter a raffle to win a Kindle Fire, which is rad.