I found this post on thewifiweblog to be pretty interesting. They did some testing of in-flight wireless over Seattle and the results were good. Check it out here.
First Hand Account of Connexion by Boeing
Glenn Fleishman goes into detail about a recent demo flight he was invited to for the Connexion by Boeing inflight Wi-Fi service. Glenn tests video conferencing (see picture), Voice over IP, Email, and blogging while flying in a loop around the Seattle area.