Battlefield Blog has word that Battlefield: Bad Company 2 is on pace to be the top-selling title in North America and Europe for March 2010, having sold over 2.3 million units. They say the title is so popular "that EA and DICE have had to add even more hardware to handle the player numbers," and that they "continue to monitor online play daily to make sure everyone can play as well as continue to work on the game for future updates and DLC which you can get at no extra cost with the VIP code (PC BFBC2 players will get the content in the form of downloads without the need for a VIP code)." They also have an updated list of milestones for the project:

81 billion points have been earned in online multiplayer sessions
43 million weapons and gadgets have been unlocked in online multiplayer
Over 6 million video views on YouTube
2.9 million hours have been spent playing online in the last 24 hours alone
230k peak-concurrent-users (PCUs)
Over 44k Twitter fans (most out of any EA title) http://twitter.com/OfficialBFBC2