Every week a community of hip hop producers agree a sample to cut up and they all post their beats using the same sample. It's for advanced producers that aren't afraid of a challenge. It's designed to keep your claws sharp. The facebook group is where most of the action is: http://www.facebook.com/groups/sundaysample It's a cool community, cool samples; you get feedback and link up with like-minded beatmakers. You can see all the history on www.sundaysample.com