NVIDIA is doing a bit of work publicizing titles using its PhysX technology, including Darkest of Days. A press release sent out today contains some info about the game, a few new screen shots, and of course plenty about PhysX. You can read it here.
PhysX is part of an interesting trend toward moving more non-graphics computation onto the GPU. 8monkey is currently conducting some research into adding some GPU simulated particles and fluids to Darkest of Days with PhysX. Expect more developments in this area soon.
Press Release: NVIDIA PhysX Technology Brightens Darkest of Days