Paypal and google checkout now supported by coolcart - I use Coolcart shopping cart service for my ecommerce business. I first used the free 30 day trial package to evaluate the product before purchasing it. It provided me a few good features like PayPal support, credit card processing, and its ability to export the order data in xml, text, csv and excel. In order to a use the service I had to shell out $17.50 per month. They even have US address validation built in. The only bad point is that I wish I could offer both UPS and fedEx.