This is, in my opinion, one of the best charger I had read or heard from CES. It is called the RCA Airenergery WiFi Hotspot Power Harvester. As the name implies, it harvest energy from WiFi signal and charge up an internal battery and this battery can in turn charge your gadgets. Cool! Video after the break.
It will be available from Summer at US$40 (based on the conversation from the video).