Sky Harbor has, without a doubt, one of the best places to take great airliner pictures.
It is located above Terminal 4 (America West and Southwest), on the top of the parking garage. It is open-air, and you have excellent views of all concourses at that terminal, and also of both runways.
Tom in NO (at MSY)
"The criminal ineptitude makes you furious"-Bruce Springsteen, after seeing firsthand the damage from Hurricane Katrina