Raptr (where I work -- full disclosure) still has Ghost Recon: Future soldier beta keys (Xbox 360) to give away as part of its new Rewards system, but the offer expires at the end of May 1. Basically, if you play a previous Ghost Recon or Assassin’s Creed game, or any one of a bunch of other popular 360 games, you can qualify for a beta key if you're in North America.