This is cool. Fruit Ninja now uses Game Center to quickly match you up against another player (or a friend if you want) for a multiplayer game. It throws fruit it in the air, the blue outlined fruit is yours, red is your opponents (slashing their fruit is minus 3 points), and white is everyone's. Game Center is looking promising now; it seems super convenient to be able to join up with friends, or use the matchmaking to play random people, and on top of that more and more games are adding achievements for it. You should get the update and try it out, it's pretty neat.