I'm writing this from Portland Airport using their free wireless Internet access (essid "FlyPDX"). Their implementation is really slick. When you associate, you have to click an agreement saying that you realize it's free, no tech support, etc. Then it shows you a map of the airport with all of the hotspots shown along with an indicator next to the hotspot you're currently using. Signal strength is excellent and dslreports shows 1.4Mbps download and 760k upload speed.

Portland is the first airport I've seen that has done this, and it rocks! I don't understand why more airports don't include free Internet access in the services they provide. Often consumers do have a choice at how their flights are routed (if I'm flying to New York, do I connect in SLC or DEN), and I would definitely choose an airport that had free wireless first. And I can't imagine it costs them much to run, in the grand scheme of things... especially since they don't have to pay an expensive support staff to handle complaints when the billing system messes up like on every other hotspot I've used :-)