The second wave of Borderlands DLC will arrive on January 7^th, 2010. The DLC called 'Mad Maxxi's Underdome Riot' brings an abundance of new goodies including three new arena modes and more rewards, weapons, and XP. But the coolest addition this pack brings is the ability to store your guns and other equipment in a bank, which felt like something missing from the original game. So look for this DLC next week on the Playstation Store selling for $10.