According to a screenshot of an upcoming issue of the magazine, OXM UK, the upcoming Battlefield: Bad Company 2 will support 40 player online battles.
No other confirmation regarding vehicles or multiplayer maps or modes were made.
Battlefield: Bad Company 2 is a sequel to the best-selling original, Battlefield: Bad Company. BF:BC 2 will be hitting the Playstation 3, Xbox 360 and PC, probably releasing sometime this year.
Everyday PlayStation 
i was wondering if the trophy list for bad company 2 will be out soon
i found the trophies list. is the ranking system going to 50 for online.