I think that Spoondoolies is missing from that list. Granted they are pretty new - I'm fairly certain their numbers come close to AM.
AM3 power usage is a bit better then Hammer (SP10 chips), but only a bit.
That said, it's Spond 1st ASIC, and the 2nd gen Rockerbox (SP30 chips, tape-out start of May) have already a much improved numbers:
http://storage.googleapis.com/spond_public/materials/rockerbox_brief.pdf