If any of you live in the Nashville area, the MAC store at Green Hills Mall takes back the B2M stuff in exchange for eyeshadows, lip glosses, and lip sticks. And they have no limit for how many things you can get. I took in 48 de-potted e/s pots and got 6 e/s and 2 lipsticks.
You can only get eyeshadows that are in the pots though (which is actually even more of a benefit to you cause then you go home, depot the new shadows that you just B2M'ed, and take the newly depotted shadows back for MORE free stuff!!)