Apple sells one million iPhone 3Gs in just three days after launching on July 11. iPhone 3G is now available in 22 countries.

“iPhone 3G had a stunning opening weekend,” said Steve Jobs, Apple’s CEO. “It took 74 days to sell the first one million original iPhones, so the new iPhone 3G is clearly off to a great start around the world.”

The new iPhone 3G combines all the revolutionary features of iPhone plus 3G networking that is twice as fast, built-in GPS for expanded location-based mobile services, and iPhone 2.0 software which includes support for Microsoft Exchange ActiveSync and runs over 800 third party applications available through the new App Store. In the US, the new iPhone 3G is priced at just $199 for the 8GB model, and $299 for the 16GB model.