Apple Thoughts: iOS Game Center, The Complete Guide

"With iOS 4.1, Apple released a completely new social gaming platform for the iPhone, iPod touch and in November, the iPad called Game Center. Game Center is the mobile equivalent of Nintendo's Wii Network Play, Xbox Live, or Playstation Network. When you download games that have been designed to support Game Center, you can interact with leaderboards, special per-game achievements, and even multiplayer support complete with VoIP."

A step-by-step walk through of the new Game Center that comes with iOS 4.1. I have signed up (you can find me as Oduibne), I haven't had much of a chance to play any of the so far limited games that are available. You can also find some cursory information at Apple, or check out the list of available games on iTunes.