I've got the same equipment. I ordered Hotpass for $80. It wasn't working at the start of the show. While I was on hold to tech support I went to my bedroom TV and it was on! Rebooted the H10 and it showed up. Also noticed that by hitting menu and audio options, I could listen to the Earnhart channel sound or the Fox sound at the push of a button. Pretty cool. Found I was watching more on Channel 799 than I was on Fox even though it was low def. All in all, a very positive experience. I'm satisfied with my $2 per race investment. Looking forward to next week.
I suspect that the negative comments on this thread are by people who are not big Nascar fans. For them, the Fox broadcast is enough.