When I read about this vending machine, I have to admit, I teared up a little (with excitement). The basic idea: You put something in the vending machine and in exchange - you get to take something out. What? What? It's called Swap-o-Matic and I think I'm in love.
Yep. You give something to get something.
You register your email address on the touchscreen interface and then you get three swapping credits. When you donate items, you accumulate additional credits. Then, you swap those credits for something in the machine.
Another thing I love about this project: It works on the honor system. Which may eventually mean that it doesn't work at all -- but in the meantime, I plan to hunt one of these guys down and swap to my little heart's content.