The Battlefield Blog has more details about the Beta, which begins next week. These details include information on game mode and map, a link to the beta feedback forum, caveats that the beta may have down time and connection issues, information on dates and how to get in, and confirmation that you must have a 64-bit OS on PC to run the beta. They also go into detail about partnering with a new Gameblocks for a new anti-cheat engine called Fairfight, in addition to continuing to use Punkbuster. I will be curious to see how this works - will it effectively reduce the cheaters? Will it cause legit players problems like Punkbuster has in the past?
Lastly, those participating in the beta will receive an "exclusive" dogtag when BF4 launches.