Amazon has introduced a couple of online payment services, namely Amazon Checkout and Amazon Simple Pay. I guess that will put it in direct competition with PayPal and Google Checkout.

The sign up process was basically easy and straightforward, much like Paypal and Google. You can send and request money like you did on Paypal besides adding fund sources.

The fee is about 2.9% + $0.30 for all transactions more than $10.

Checkout these Amazon Payments here: https://payments.amazon.com/sdui/sdui/index.htm