It’s time to make a game plan. The new Game Center app on iPod touch lets you add more players to your gaming network. Invite friends to join. Then totally dominate them. Take a look at how your score ranks against your friends and other players of each game. Compare game achievements with your friends. Put together a select group of friends to play with. Or choose to automatically go up against people you don’t know in a multiplayer game. So get in the game. And get your friends in it, too.