GameTrailers has a live show called "Hour One" - HourONE Show Page | Game Trailers & Videos | GameTrailers.com in which they walk through the first hour of the game. Battlefield: Bad Company 2 will be showing on March 1st at 3pm PST and then again at 6pm PST. Just a heads up. Though, I'm sure plenty of people who get the game early will be streaming it before then as well...
http://www.gametrailers.com/show/hour-one/