Borderlands getting more DLC

Hidden in a dark, damp crevice of the Take-Two mega-mountain of news today was a brief, albeit interesting, comment from Ben Feder, president and CEO. After referencing the success of Gearbox's Borderlands, Feder stated that Take-Two "will continue to support the title with add-on content."

So, if you've finished The Secret Armory of General Knoxx, Mad Moxxi's Underdome Riot and The Zombie Island of Dr. Ned, expect more soon. But, where will our intrepid foursome go next?