It seems that ATI is threatening to unleash a whole new class of acronym soup on the world - stream processing and GPGPU. In a nutshell: what if you could "steal" some of the intense processing power locked in your $600 video card to speed up your computing tasks?
Check out the plain English explanation on Engadget here:
Much more detail here:
Looks like it's a going to take a while to get out, and the coding issues aren't trivial. Still, a "Firestream" videocard might be just what you need to accessorize that 8-core CPU...