Have you seen the new Google Checkout? It’s a service like Paypal or Yahoo! Wallet, where you input a payment source to their secure server and then—at participating online merchants—you can select Google Checkout and go through an abbreviated process for payment.
It may turn out to be a handy thing to have, and when you sign up there are tons of codes for $10 off $20 at various merchants. Like Starbucks. Or Jockey. Or eCost. Just lots of places. Go check it out.