I'm kinda suprised people are not flaming as hard as usual

. Well good luck and I hope ya get a replacement and everyything. I personally would have sent it in for replacement because it was in fact not the overclocking or anything you did that caused the card to die, it was just defective and had something else wrong with it. If it were my fault that something died then I would not send it in because I know the risks I take when doing this sort of stuff, and I hope most would agree with that.
Also, if you are looking for a new card look at the x800xl, I have heard nothing but good things about this and it would help you avoid the nVidia side of things for a good price/performance ratio. Although I do love my 6800GT there was just something about my 9800 Pro that I miss.