Many of us here at Engadget know the value of free airport WiFi all too well, having just flown back to our various corners of the globe -- if a cellular or toll-based hotspot isn't an option, free internet access can be a lifeline. JiWire and AWG don't want us to face that dilemma. They're expanding their partnership to use JiWire's location-based ad system for free, sponsored WiFi across the US. Requiring that passengers see a local ad when they hop online is the best of both worlds, the partnership claims: we get the connection we crave, while nearby shops get exposu
