I've got only Words With Friends, and there's no need to be a no-friends Norman (or Nancy) on the idevice, right?
Well if you like action based games there's Modern Combat 2, N.O.V.A. 2, Real Racing 2 and Doodle Army 2. (enough sequels for you?) And for slower paced games i know there is Disc' Drivin, Scrabble, and Monopoly. I'm sure there's many more that i'm forgetting atm.
I recommend fruit ninja multiplayer, if not then try starfront collison oh yea add me on gamecenter- CrisisInNeed
best multiplayer game i've played till now has been Pocket Legends, a 3D MMORPG... not to mention free too. After that, on a different category, Kingdom Conquest, a MMORTS war game... closest thing i can pair with would be civilization, although the similarities stop at game concept.
If you're into strategy games, then Rogue Vertex Online is definitely one to check out. It's got a nice community and the game is constantly being updated.
First try Real Racing 2, you can't never miss that. Then try N.O.V.A. 2 which has good multiplayer mode.
4 story is a multi player game in which players of the game are fight to the other players in group it is a battle game or can play online in this game 49 to 50 player cam play it together.