It won't be enough to cancel out the Engadget editor using in-flight WiFi to upload photo galleries (sorry, guys), but it should make web surfing from coach a little less tedious. United has just announced that it will be upgrading its Gogo in-air WiFi service to take advantage of Gogo's enhanced ATG-4 service, which promises to bump speeds from the current 3.1 Mbps to 9.8 Mbps using directional antennae, dual modems and EV-DO Rev. B. Before you get too excited, though, keep in mind that United has so far only committed to retrofitting its premium service fleet, which includes 13 planes that