US airport wi-fi list

I found this list of US airports that offer wi-fi internet facilities. What I found really interesting is that while some of the larger cities either did not have wi-fi internet facilities available (Washington Dulles, Washington Reagan) or charged a high amount for it (San Francisco and Providence $6/hr, San Antonio $7.95) several smaller cities like Akron, OH, Albuquerque, NM, Birmingham, AL, Boise, ID, Charlotte, NC, Columbus, OH, South Bend, IN and Wichita, KS do not charge for wi-fi internet facilities. Nice to note my college days airport Kansas City International as well as Kansas City Downtown Municipal both have free wi-fi access.
See the full list here.