Can you give us a quick overview of Google Checkout?We launched Checkout last year to improve the experience of online shoppers. Typically people start their shopping process with search, and Checkout improves that experience with the Google Checkout shopping cart badge -- an image next to ads that use Checkout that helps users identify fast, secure places to shop. Once they click through to the store, we also make it easier to buy with a single Google sign-in -- that way, shoppers don't have to re-enter their purchasing information every time they buy online.You mentioned the shopping cart badge on AdWords ads - why are you using that?When people begin shopping by searching online, they're looking for places to shop that are convenient and secure. The Google Checkout badge makes it easier to find these places by displaying a badge (or image) on the AdWords ads of participating Checkout stores. The badge is like a little sign on the AdWords ad that helps shoppers find stores that accept Google Checkout.You've been testing different badges. Any updates to report?Yes, we're constantly testing different badge images to see what provides the best experience for shoppers. Recently we updated the image of the badge from a shopping cart to a Checkout button because we find the new design helps people find convenient and secure places to shop more easily.Where should advertisers go to learn more about Checkout?Advertisers can take a closer look on the Google Checkout homepage.