If you haven't gotten Borderlands yet, or any of its DLC, Amazon is having a great sale on the game with both Mad Moxxi's Underdome Riot and The Zombie Island of Dr. Ned included for free. You can get the game for $37 on the 360 or $27 on the PC and both pieces of content on a separate disc are free. Normally those content packs are $10 a piece! For whatever reason the PS3 version of the game is not included with the sale.
Now your cousin Bill has no excuse not to pick up the game and play with you. Aunt Edna? Tell her to put down the cake mixer and pick up the lightning powered sniper rifle to shoot some midgets. Grandma? You know she's gonna go berserk and punch some Skags in the jaw.
Thanks Smurphster for the tip!