I am from India and Google Checkout is not available for us.What are the additional feature of it than paypal ?
Paypal actually has more features that Google Checkout. Google Checkout is more similiar to 2Checkout which is a 3rd party payment processor plus shopping cart features. It allows people to pay you and at the end of the billing cycle, the money minus fees goes to your bank account. Paypal is more like a virtual currency which not only allows you to receive money via their merchant services, it allows you to spend the money too. The beauty of Google Checkout is probably because it is tied in to Adwords and more you spend on Adwords, the lower your total cost at Google Checkout would be. http://checkout.google.com/sell/?gsessionid=fCO17E5ZxbE Fees are typically lower than at Paypal.
I got no idea about Google Checkout, it is probably going to be US and UK only for some time. I am already happy with Plimus which I am using and thus even if Google Checkout is made available, I would probably not consider it since I do not use Adwords. Personally I did not have quite a good experience with Adsense so if they are going to treat us the same way, I probably not bother about them.