I fly a lot (read: weekly) for work. If a plane offers GoGo, it's a given I'll be online the moment we clear 10,000 feet, every time. While en route from MSP to OKC this week, I successfully logged into GoGo's in-flight network using my MBP. Was humming along just fine...posting messages on Facebook (https login), confirming flight info on a couple of travel websites, launched Thunderbird to process work-related emails...the usual. While in Thunderbird, outbound messages suddenly slowed waaaaaay down, each one hanging for 30-45 seconds before actually "departing." Then, the shocker--an error message popped up saying Thunderbird could no longer send emails because another computer in the network shared my IP address. Needless to say, I immediately shut everything down, worried that someone on the flight had hacked their way into my laptop. Looking back, I doubt whether or not that's possible, but am just paranoid enough now to question what the heck happened. Anyone have a clue here?