I don't overclock because I feel like if you want your processor to be .4ghz faster, you should buy one that is. Now I understand that chips that could run faster are forced slower due to demand for cheaper processors, but still you are voiding your warranty for a slight gain in performance. And often it's not the processor that's making your Everquest 2 or gentoo Stage I compile slow (ok maybe it is for the gentoo one but still) it's ususally the file system / io devices
I mean, you dont buy a ford and tune the engine to the same specs as a racecar. While it *might* work it's more likely gonna blow up your engine.
Now eons ago, I did overclock my 486 a tad because back then it really was the processor slowing stuff down and it ran plenty cool where I lived.
But nowadays, dont do it. You'll shoot your eye out kid

--Taladon