im considering getting WHS, and i know the requirements arent too steep, but with that said, i have the following box
Abit BP6 (smacks you if you dont know) with dual 533 celrons, not overclocked. 768mb ram, and too many disks.
im pretty sure the highpoint controller doesnt have drivers for it. on my win2k3 box im using the xp drivers, and that isnt much fun, its making me almost revert back to win2k server..