I might have to give inFamous a rental at some point. I must be in the minority that found the demo underwhelming. It looked snazzy and the powers were fun, but the world seemed kind of boring and I didn't care for the feel of the combat.
Should be a game right up my alley though, so maybe the full game will catch me more. I was looking forward to both this and Prototype.
I'll have to stop playing Undisputed long enough to try either of them though.