Boingo's WiFi plans may come in handy for frequent travelers, but they haven't exactly been the most straightforward -- especially if you're using multiple devices. The company's gone some way towards simplifying things today, however, announcing that it's revised its unlimited WiFi data plans so that you can now use any two WiFi-enabled devices (as opposed to just two laptops) as part of the basic plan, and up to five more for an additional five bucks apiece. Unfortunately, none of those changes extend to the company's recent partnership with GoGo for in-flight internet access, which you