Beyond3D is your friend; hope you don't mind some severe-duty geekage though
There are members of that forum from all walks of the 3D life, such as hardware developers, driver developers, game and app developers, and the normal enthusiasts like you and me.
Lots of good stuff to be learned there. The cliff notes seem to be this: Larrabee doesn't
look like it's going to be a strong competitor to NV / ATI's top offerings, but should have massive vector math capabilities + much more fully-featured processing abilities (memory management, x86 instructions, et al) so it can do things like distributed computing and raytracing far better.