Well, I'm determined to get ML running on my lowly 'ole Macbook (getting close to five years old now). As is the case, its possible to get it running on macs such as mine (Early 2008 Macbook), but sadly without any graphics acceleration. This is because there is no 64-bit Mac Intel X3100 graphics drivers present, or avaliable anywhere from what I understand.
To cut to the chase, I managed to upgrade the video card on my Macbook by sacrificing both the built-in Airport and any sort of mobility. The mobility won't be a problem as I plan on fitting it into a old PowerMac 6500's case (the motheboard was mostly dead, pci slots didn't work).
10.6.8 apparently has just prototype drivers for the 6xxx series ( there is a kext for ATI 6xxx in there). I'm hoping that 10.8 works fine with the drivers it comes with and I don't have to do any altering to get it to work (like Hackintosh users generally have to).