I hope this wasn't already asked--I didn't read ahead--but is there any chance Apple will use the new NVidia mobile gfx chips/cards? I forget their name now, but I think it is supposed to be released soon.
Sure, why not? Apple uses Intel, Intel competes with AMD, AMD buys ATI, nVIDIA allied with no-one, releasing new GPUs in a few days... I suppose that logic could work.
But I don't think so. I don't think Intel are stupid enough to put any kind of pressure on Apple to not use AMD's graphics cards. They would probably be happier if Apple did use AMD GPUs because it spreads the image that they are happy to compete with other manufacturers, they have nothing with which to compete, as they don't make dedicated GPUs, AMD really aren't that much of a threat at the moment, and if Intel did put pressure on, Apple could always move to AMD, which would welcome them with open arms.
Other than this, I think AMDs graphics cards will be much better than nVIDIAs, and should definitely use less power, as they are apparently being made on a 65nm process, rather than the 80nm process the 8600's are probably going to be on.
Also, AMD are supposed to be releasing X2900XTX all the way through to low end, plus high to low end mobile GPUs (My X2600) at the same time. I don't know if nVIDIA are doing this too, they might, I don't know.
Yeah, so it's possible, but I don't think so. Apple will use whatever is best.
I also withdraw my comment about the X2300. iW00t has alerted me to the fact that it is quite spectacularly crap. Like much worse than the X1600 presently in the MBP.
And in terms of integrated graphics, Apple will probably always use Intel.