http://www.gametrailers.com/player/35843.html and a Cliffy B interview- http://www.gametrailers.com/player/35834.html
the first vid isnt working anymore, but it looks like from what you can see in the interview it looks pretty cool
Saw some highlights on G4s Xplay. Basically, they are giving it a really good party system and support, and they are refining gameplay to elimate rushing. Namely, your guns will have "stopping power" which can literally slow and stop a rushing/oncoming enemy, forcing them to seek cover. Cliffy B. said thats how the game was meant to be played and they want to try and make that more essential than in 1. Also, the body shields will last for about 1 lancer clip, 1 boomshot, 1 grenade etc. before the body explodes leaving you open.