_I_ have an HD Radio (actually 2 of them) and as far as what's on and what isn't, I checked recently and found the same results as MarcB, and here's what I'm currently getting from the dead zone area I live in (I miss the great reception in the old days when I was in the northern end of town):
WNPR - HD1
WWYZ - NO HD, only RDS (I will admit this could be due to my location)
WZMX - HD1 & 2 (HA! an ad for a Pioneer HD Radio at WalMart!)
WKSS - HD1 & 2
WTIC-FM - HD1, 2 & 3
WPLR - NO HD, only RDS (Again, I believe this to be a location issue)
WRCH - HD1 & 2
WKCI - HD1, 2 & 3
WDRC-FM - HD1, 2 & 3
WMRQ - HD1 & 2, but nothing for 3
WHCN - HD1 & 2
and I can't get anything on AM as this unit is weird that way, so I can't check WTIC-AM
The only thing I show here missing is WMRQ HD3 as I can't give accurate information on WWYZ and WPLR or the Springfield/Enfield area stations that I used to get before I moved.
And as far as the HD pirate that has yet to sign on, don't look for that any time soon, the guy who was planning on it has put that project on the backburner if not dropped yet.