Google has launched a new service called Google Checkout. This allows you to add a Google Checkout shopping cart to your site and process credit card orders. Google is promoting the site as a secure method to conduct online transactions as a purchase can be made without even submitting your email address to the site.
The bottom line at this time is: 2% of sale + $0.20 processing fee!
Wonder if PayPal (owned by eBay) is nervous?
https://checkout.google.com/sell?promo=sbop