It's another gadget, but you might want to consider picking up an iPod touch to act as a bridge between your EyeFi and whatever network you'll have access to. EyeFi shows it has an app that allows direct transfer to an iPhone, then you can use the iPod to upload to the hotspot and easily configure it to access various hotspots.

I guess for the EyeFi to automatically upload pics whenever it finds a hotspot you'd have to leave the camera on most of the time?