Here we are. The war has started:

eBay bans use of Google Checkout for auction payments: "Xeni Jardin:
BoingBoing reader Catspaw says,

A week after it was released, eBay has added Google Checkout to its list of online payment methods not permitted on eBay. A Google spokesperson says: 'Google Checkout is not a beta product. Google has a long history in billing and payments for AdWords for premium services, such as Google Video'.


Previously on BoingBoing:
Google launches 'predatory' Paypal rival Checkout, much is prohibited

(Via Boing Boing.)