The latest version of the beta includes 3 new weapons, a new map, and a new Free-for-all mode that eschews team-based play in lieu of shooting anything that moves. To sweeten the deal, killing other players will earn you raffle tickets for the "Death(adder) to your Enemies" contest. The random winner gets a Razer DeathAdder Mouse.
You can download the game client from FileShack. Just make sure that you're logged in so we can email your beta code when you start grabbing the file. For a glimpse of the game and its guns-for-hire take on global economics, see below: BOOM video 2862