LOL I believe that's Rampage in the background of the video commenting...I was LMFAO...when he was in the clinch getting knee'd..."I'm having flash backs" http://ps3.ign.com/dor/objects/876981/ulti...rt1_062308.html
Yea, I can see the ground game aspect as a really hard game to make properly. The stand up game shouldn't be too hard to do. However the ground game with all the different submissions, using a submission attempt to get up or roll the opponent, setting up a submission, as well as the ways fighters defend ground and pound, where some just prevent there from being any space and cling onto the opponent, others hold onto the opponent's wrists, some use butterfly, some use rubberguard, some just dodge blows and block them with forearms, some try to fight back, and so forth.
I thought the game looked pretty damn decent for a game that is still months away. It's not slated for a release until Spring '09.