There's a cold war going on with a select few iPhone devs, as each attempts to become the 'Xbox Live of the iPhone', though it's looking like OpenFeint might be out in the lead.

PocketGamer.Biz has exclusively revealed that the social networking gateway from the Aurora Feint developer has registered more than one million active iPhone gamers playing titles that use its OpenFeint 2.0 system.

The system was made available at WWDC 2009, and is now being used in more than 100 games including Pocket God, Sentinel 2 and StickWars.

To celebrate the platform is being made free for indie developers, and is being heartily endorsed by existing users such as Pocket God's Dave Castelnuovo: "Now that OpenFeint is free, there is no excuse not to use it," he says.

Check out the full, exclusive article over on PocketGamer.Biz, and let us know your preference for the Xbox Live of the iPhone.