I own my box also. Paid $799 in January 2004. Voom gave me a $300 credit toward programming, and I had free VaVaVoom from January to April. This STB is the original box, and was never swapped out. It is still working and I never really had any problems with it. I'm well over 3,000 hours since the last re-set. I'm satisfied that I've gotten fair value for what I paid.
If you take the $799 and subtract the $300 credit, I have $499 invested in the box. Then subtract out $240 for 3 months of free VaVaVoom, and I have $259 invested in the box. I've had Voom for 14 months, which would have cost me about $154 if I had been leasing. If the signal got turned off tomorrow, I'd be about $105 in the hole. But...it was my choice to buy and NOT to convert to a lease when it was available, and I can live with the loss of $105. If we make it another month, then I'd only be out $25. If we make it to May, then I'm past the break even point. Although I would accept some sort of refund, I'm not expecting one.
I could always donate the STB to the Voom Hall of Fame and take a tax deduction. Or maybe Motorola would like to buy it to do some research on a box that has worked non-stop for 14 months.