Lol... I was running one, up until about 2months ago..
I still remember, I bough a Cel366 (wasn't?) and tried to overclock it to 550, but it wouldn't go, so I returned it to the store and got a Cel400, (they had stopped making the 366's then) and I got the 400 to goto 500, in my BX6 R2 (basically the same as a BH6.
But a few months ago, I realised, what a mess my computer was, and for the records i'm a bit of a geek, and do quite a bit on computers everyday... I was going to make a real cheap stepping stone upgrade tho, and so I purchased a Celeron 2 (1.2ghz) and overclocked it 1.6.. I know it could go ever higher, but I need to give it more voltage, and the motherboard (still the same BX6 rev2) won't let me.. I even purchased a new radeon 9800se (planned to open up all the 8 pipes over the 4) but it wouldn't fit in my AGP 1.0 slot
Anyways, the celeron 1.2 cost me like 30something bucks (penuts) and it's done pretty well imo.. but I do need a serious upgrade.
So i'll be buying a X2 when I can find one in Australia