TOL / Toledo, Ohio has it available. Also Toledo-based AirPath Wireless http://www.airpath.com has expanded their network to dozens of airports across the US and Canada. They are also working on Europe now.
AirPath did very well with AirTran in getting all their gate areas done. Look for them to hook up with 2 more airlines here soon. Unfortunately I can't say who...since their CEO is a friend of mine and he knows where I live.