Here is a link to an 11 minute of MOH multiplayer game play. It shows two different maps and is probably what we can expect in the beta release. I'm not seeing destructable environments like we saw in BC2. My understanding is that this is developed on the same game engine.
http://ve3d.ign.com/videos/68837/PC/Medal-of-Honor/Gameplay/E3-2010-Eleven-Minute-Multiplayer-Gameplay-Movie
http://ve3d.ign.com/videos/68837/PC/Medal-of-Honor/Gameplay/E3-2010-Eleven-Minute-Multiplayer-Gameplay-Movie