more info http://physxinfo.com/news/5671/physx-sdk-3-0-has-been-released/#more-5671 Looks like they finally moved in the right direction (got rid of x87 code and made it multi threaded), but as far as unifying goes its still fails - make it OpenCL and it will be much better and everybody is happy:knock:
Basically its for developers. According to that post it no longer requires the software bundled with the drivers.
well i got my approval and according to a faq on the site, you have to have the physx drivers installed along with this sdk in order for it to work properly. i will download it tonight when i get home and test out some of these neat programs