Great thread, thanks for keeping it maintained.
Incidentally, As post 1 indicates, seatcounter is a good place to get info.
Unfortunately, I shot over to seatcounter and saw this message:
A message to our valued users:
United Airlines has recently requested SeatCounter to stop displaying upgrade and award availability data.
UA is currently discussing the possibility of providing this information to SeatCounter.
If you would like to see this information available on SeatCounter, please let United know.