What I had ment on my posting is that in order to use the "checkout using google" feature, the customer must have a google checkout account, or must create one. There is no method for a user to just enter a credit card and NOT be a part of the Google Checkout program. Paypal on the other hand does not force you to be a paypal member. If you don't have a paypal account, you can just provide credit card details for a one time purchase and you're done with the sale.