pageoneresults - 5:50 pm on Feb 11, 2008 (gmt 0)

I look at it this way. Google is a brand. Anything with that brand on it is going to attract attention. If its not difficult to add a Google Checkout widget/plugin to your store, then by all means, add it. You are just providing the consumer one more method of making payment, there really are no cons to that. Even if they don't use the Google Checkout, the badge itself has an impact as mentioned above.