i'm no expert myself; i've only done it once. but from my understanding the only illegal thing about (assuming you buy the OS for like 40 bucks and don't pirate it) has to do with a part of the agreement that says something about only installing the OS on apple products. i'm not sure if this is accurate now or has ever been truly legit, but i remember reading that, because of the way they stated that part of the agreement, you could technically just slap an apple logo sticker onto your computer and you wouldn't be contradicting anything.
in any case, i don't think anyone's ever been sued for making a hackintosh. it's pretty commonplace. actually getting one to work is a long process though; you have to enjoy working with computers as a hobby or there's no way you'll have the dedication to get it working.
Thanks for the tips, I will keep my eye open once I get my computer built. If thats the case for it, I wouldn't mind looking into it.