The Official PlayStation Blog had a live Q&A chat with Nate Fox,Game Director, and David Meyer, Programmer, from Sucker Punch. Here’s what we know about inFamous based on that chat:

• The idea for inFamous came from mashing a bunch of different ideas in order to create Grand Theft Auto with super powers.
• inFamous should take you about 25 hours if you are going for the Platinum Trophy.
• Some areas of Empire City are inaccessible in the beginning of the game.
• All kind of super powers were considered before electricity was chosen.
• Empire City is over 100 hexes, each hex being the size of one Sly Cooper open world exterior.
• All of Cole’s base powers will be affected by the moral decisions made by the player. Also, people will react differently to Coal according to what the player chooses to do.
• Sly Cooper references are scattered around the game.
• There are different cutscenes for different game styles – good and evil.
• There are 3 gangs in the game:   The Reapers, The Dustmen, and The First Sons.
• Players will be able to use XP points to improve Cole’s powers.
• The day/night cycle changes to provide the best lighting possible for the story missions. It is not continuous.
• Batman Begins, the comic DMZ and Batman: No Man’s Land influenced inFamous.