We might need to fill the gap while we wait for the Steve Jordan Volt shoes to hit the market. I noticed this charger from M2E Power today.
http://news.cnet.com/8301-11128_3-10023421-54.html
It probably needs more human motion then me moving my thumb on the page button for 6 hours but it's an interesting idea. I wonder if they could build something like this into future readers or cases.