Game Center is the new app that will let you play games with your friends on an iPhone running iOS 4.1 or the iPod touch. If you have an iPhone 3G, you are out of luck.
All you need to do is login to Game Center with your Apple ID, download any games you want to play and start playing! You can invite friends or look at pending friend requests that you may have received.
Apple’s Game Center adds a new dimension to your social network by extending it to gaming. Now all we need is 4.1!