That's my understanding, . . . $100 rebate and 6 months free HD. BTW - the rebate form I provided the link to is what the CSR told me to fill out for the $100 rebate.
FWIW - I just got my 722 receiver installed yesterday. So, . . . I looked at my bill activity this morning to see if all was 'cool'. I can see the first 2 months of 'Free HD' show up as credits (why 2 - I don't know, but at least they are there). They are numbered 1 of 6, 2 of 6, . . . so it is pretty clear that the 6 months of free HD is taking place on my bill.
As for the rebate, . . . I was told it was going to be $100. Wasn't clear to me when I put in the work order if it was a one time or $10 over 10 rebate. The form is clear it will be a one time credit to the account, . . . but doesn't specify an amount. As for programming to qualify, . . . I don't know what you have, but it looks like pretty much anything qualifies, . . . as long as you were a sub for 1 year or more.