CaveMan's build seems nice, but did it run good? was it a pain to install osx on it?
As far as hackintoshes go, it's pretty easy. The Asus board has the 9300 chipset, which is effectively the same as the 9400 chipset used in all the current Macs (except Mac Pro). The only differences are no on-board wifi or Bluetooth and you can only run one display from it (up to 1920x1200). But otherwise, all else works.