Ageia waiting on Microsoft for physics support
 

There is no API from Microsoft that actually supports or cares about the physics and DirectX 10 is definitely not going to have the physics part, at least not at the beginning.

Ageia has been talking to Microsoft for some time and both companies are considering how they can make the physics better. The important guys - the engineers - are talking, so we're not dabbling with pure marketing strategies and hoyt air. Those people actually do something concrete.