Ye, these are part of what they are calling the 'Triangle', CPU, GPU, PPU, Ageia seems to be the forerunner yet they told us that we would see these in mass production during June this year with games such as Unreal Tournament already 'using' its capabilities. They announced this at the beginning of last year though, so I doubt we'll see them for a while.
Edit: Oh, they're on sale
Edit: Oh, they're on sale