JetBlue's been quoting some pretty ambitious figures for its new ViaSat-powered in-flight WiFi, and during our test flight last month, the Ka-band satellite service seemed to be up to the task. The promise? 12 Mbps internet at every seat on the plane; enough to stream HD video, download new apps and conduct your online business just as quickly as you would on the ground. That performance pledge generally assumes that only a handful of passengers will be watching Netflix films and YouTube clips -- however, that condition went right out the boarding door when the airline filled a few dozen A320 seats with journalists eager to push the service to its limits on today's official launch flight. It was a charter plane to nowhere -- a 90-minute journey from New York's JFK airport to New York's JFK airport -- but for this group of passengers, it was the ultimate adventure.