HasWifi Tells You If Your Flight, Well, Has Wi-FiS  If you're
enamored with the magic of in-flight Wi-Fi, free web service
HasWifi will let you know whether the flight you're looking at
has it or not, so you can stay connected throughout your entire
trip.  Unfortunately, it's difficult to tell which flights have
Wi-Fi on board when you're booking your tickets. HasWifi lets
you search by flight number (or with travel planning service
TripIt), letting you know which flights do and don't give you
your internet fix in the air. You can even vote a result up or
down, helping HasWifi deliver more accurate results to other
users. Right now, the service only tracks GoGo-enabled carriers,
but it's got a pretty good database already, and still
expanding. Hit the link to check it out.