At a press event yesterday Glenn Fleishman, aka Mr. WiFi NetNews, and others got to experience the new in flight WiFi available on Virgin America. Its pretty much the same thing that you're going to find on American Airlines and Delta, with one difference. Virgin and Google are offering video streaming with Google, and they're also less sensitive to porn according to Gizmodo.
I've yet to experience the new flavor of WiFi in the Sky, but hopefully the airlines are more Mac friendly with power outlets. In the past on SAS the MacBook Pro drew too much power, and on Virgin Atlantic the didn't have power leads for the MacBook Air. Virgin America is reported to have in seat power on all their planes.
This is all made possible by GoGo, AirCell's name for in flight Internet connectivity that works using EVDO to the ground.