Google's new Google Checkout has been officially disallowed by eBay as a form of accepted payment within the eBay network. As I reported yesterday at SEW blog, if you visit the eBay Accepted Payments Policy page, and click on the "show" link on the "Some Examples" portion, you will see;
Payment Services not permitted on eBay: AlertPay.com, anypay.com, AuctionChex.com, AuctionPix.com, BillPay.ie, ecount.com, cardserviceinternational.com, CCAvenue, ecount, e-gold, eHotPay.com, ePassporte.com, EuroGiro, FastCash.com, Google Checkout, gcash, GearPay, Goldmoney.com, graphcard.com, greenzap.com, ikobo.com, Liberty Dollars, Moneygram.com, neteller.com, Netpay.com, Nochex.com, paychest.com, payingfast.com, paypay, Postepay, Qchex.com, rupay.com, scripophily.com, sendmoneyorder.com, stamps, Stormpay, wmtransfer.com, xcoin.com
WebmasterWorld has a featured thread on this topic, with two pages of responses so far. Many feel that it is a smart move on eBay's part.
Forum discussion at WebmasterWorld.