Borderlands 2 $100,000 Loot Hunt gets underway today, a day later than was originally announced (thanks Neutronbeam). Here are the official rules and here's the lawyer-free version:

Ambitious loot hunters can enter the sweepstakes simply by taking down the daily targets once a day for a total of 28 entries. In addition to the many weekly sponsored prizes, one lucky loot hunter will win a grand prize of $50,000, and four others will win varying amounts of cash totaling another $50,000. Only US players are eligible for cash prizes and sponsored prizes. However, all players worldwide can participate in the Loot Hunt, and the exclusive community goals granting access to unique in-game loot.