Some fantastic news today from the Just Cause 2 Multiplayer mod team today. Earlier they revealed that the final beta test is slated to kick off on December 7 at 8:00 (UTC). Don't fret though, as the multiplayer component is coming to Steam!
On release, you'll be able to download the client and server from Steam, just like a normal game. This means complete Steam integration, including joining on your friends and more.

Of course, before we release, we need to ensure that 0.1.0 is rock-solid. This beta test will let us work out the final issues, and give everyone a chance to play in the biggest demonstration of chaos this year.

Even better, everyone who owns Just Cause 2 can go snag a key for Steam for the mod. Simply head on over to the Just Cause 2 Multiplayer key page to snag your key. You do need an account on the site, but fortunately they do accept the sign in method through Steam. Sign in, grab your key, activate your key through Steam, and then wait for the tests and the release to enjoy!