People of Tumblr. If you like to give and receive gift cards, or even receive cash gifts online, use GiftRocket. I get some gifts from family/friends/online peeps for buying stuff online, and GiftRocket has been so easy to use and work with. You can give gift cards to a whole bunch of companies, or just send a generic one that can be redeemed for cash to a bank account or PayPal.
It is US only, but hopefully they might consider expanding in the future?
Oh and their Community Manager Jake is a total badass (and he apparently knows it). He fixed a problem for me in like 5 minutes. Was awesome.