Going strictly by the chatter on the North American web,  you’d be forgiven for thinking the iPad is going to save the world. But there are also, oh, about a couple of billion people around who, instead of thinking about how the iPad is going to revolutionize media, can’t rely on having small, insignificant luxuries like water and constant electricity. That’s kind of a big deal if you want to do something radical like charging your cell phone, a device that is often a lifeline not just for individuals but sometimes for whole villages. That’s why the Solar Pebble seems like such a step in the right direction….