Nice job, guys. This is a great work. Your ecommerce is the most cool and easy to understand from entire web.
Now I have question:
I have never programed nothing about payment. Is the payment module on this source code ready to use? Can I take this code and try to validate with credit card operators? Or do I need to do something before?
There are already a number of popular payment providers that are built into nopCommerce (PayPal, WorldPay, Google Checkout etc.) as well as support for payment methods such as Purchase Order, Cash on Delivery and Credit Card Capture (where you process the payment yourself).
You can develop your own integration with payment providers and we encourage you to contribute these back to the community to help others.