This looks great, and one of the apps where social will continue to win over mobile.

I wish there were a way to do group buys of gift cards. There are a lot of people I'd buy a $1-5 item for, but not a $25 gift card. A $1 gift card is less than useless to he recipient. If you could do group contributions to a single gift card, a lot of the marginal $1 people could become $100 gift card.

Also, please add amazon.