Looks great. Few notes:

1) On the already crowded payment form, I don't want to devote a hell of a lot of space to something that is otherwise inconsequential (a picture of a credit card)

2) Is it a great idea to broadcast someone's card numbers so clearly? The graphic is so obviously a credit card, it would be easy for any onlooker to spot and steal.

Really, this seems like aesthetics for aesthetics' sake, which I traditionally shy from, but I always like seeing people take a swing at something.