You can purchase the Google Phone "Nexus One" directly in the web store of Google here: http://www.google.com/phone

The price of Nexus One: 529 dollars unlocked and 179 $ with T-Mobile USA service.

For the moment you can buy Nexus One Google phone if you are a consumer in the United States, United Kingdom, Hong Kong and Singapore.

In Europe the Google phone will be sell with Vodafone.