GameSpy 
Provides information, screenshots, and a movie.
http://ps3.gamespy.com/playstation-3/sucker-punch-project/IGN
Screenshots, news, and a message board.
http://ps3.ign.com/objects/800/800208.html
GameSpot
Interview with Sucker Punch producer Brian Fleming: "Infamous will have a nonlinear, open environment style of gameplay. We are making a superhero sandbox game that will allow players the freedom to play the game the way they want to play it."
http://www.gamespot.com/ps3/action/infamous/news.html?sid=6175383&mode=previews
1UP
Overview, previews, screenshots, and videos.
http://www.1up.com/do/gameOverview?cId=3161057
