MTGOX Redeem Code Bot
bitbin.it
bitbin.it
From the bitcoin wiki:
"Bitcoins from another Mt. Gox user sent by Mt. Gox redeemable code (A.K.A. coupon) may be deposited and will be available for trading immediately."
So it appears that the source code uses the Mt Gox bitcoin exchange to transfer a coupon from the issuer, e.g. a merchant, to the user, e.g. a customer.
Right?
Bitcoin coupons - what a great way to grow the bitcoin economy!