Yes, though it looks at your trophys, so now worries if you deleted the savegame... http://www.joystiq.com/2011/05/27/infamous-2-imports-your-infamous-trophy-data-to-grant-rewards-a/
As I was zipping around this weekend blast shard hunting with the lightning tether, it occurred to me that with a little tweaking, the game mechanics could made into a decent Spiderman game. Or said another way, I wish the few Spiderman games I've played in the past, had been a lot more like this game, mechanics wise that is.
Also just finished the game. Mid to late game seemed to drag due to the repetitive nature of the missions.