theres a 360 demo called frontlines fuel of war and i was poking arround after seeing a thread about it in the console sub-forum on another message board and i found an open beta for the PC. its multiplayer only but most of the time its ok because theres nothing but noobs in this game so dont worry about it.

its through file planet and you need to sign up for "one of the limited keys"
i just got mine 11:55pm PST 1/28/08 so it may be full but i doubt it:
http://www.fileplanet.com/promotions/frontlines/beta/

just thought i would share

i pre ordered it earlier tonite, i think they said Feb. 26th is the release date