According to an article on Gamespot, Borderlands 2 is on its way through the certification progress and they have begun working on Downloadable Content for the game. First up is the Mechromancer character, which will be available free of charge if you've ponied up for a pre-order.
Release is slated for September 18 in North America and 21 September for everyone else.
Release is slated for September 18 in North America and 21 September for everyone else.