Sheesh, maybe EVDO is the way to go. In London (where sadly, EVDO would not be helpful), t-mobile wouldn't let me roam. In JFK, at terminal nine, I had a weak WiFi signal that got me t-mobile access for a few minutes, and then dropped dead. Finally, here at Logan (yes, my routing makes no sense), I find that Comcast provides the WiFi, but they provide no way for me to login as a Comcast user (apparently, Massachusetts and Maryland are independent Comcast fiefdoms. Fitting, in a way, since I've been reading about the 12th century of late). Sigh.