Microsoft today announced that the Halo 3 multiplayer beta has now closed. The limited public beta gathered more than 820,000 unique participants and more than 12 million hours of online gameplay during its test period. Microsoft also announced that new merchandise, including two new Xbox 360 Limited Edition Halo 3 Wireless Controllers designed by Spawn and McFarlane Toys creator Todd McFarlane, as well as an Xbox 360 Limited Edition Halo 3 Wireless Headset, will be released this September, prior to the game's release. Check the press release for more details.
In related news, a possible alternate reality game (ARG) could start even sooner than we think (thanks Eric). It shouldn't hurt if you take a look here.