Here is the link to the website of the PhysX card. In simple this is going to allow sweet physics in games. http://physx.ageia.com
I plan on getting one in about a month. PC Gamer is going to do a write up on them next month. I will post letting everyone know what they thought of the new Physics cards. They are going to test and see if they help at all with current games, meaning speeding stuff up. The website I listed above shows several games coming out that is going to use the new card. Plus they have a demo on their website showing with and without the card. Looks pretty sweet.
Guardian