RCA Airnergy – Charges Gadgets From Wi-Fi Networks

Seems like a bit of black magic to me, but the RCA Airnergy gadget (coming out this summer) is able to charge your gadgets by harvesting energy from nearby Wi-Fi networks.  The demo unit at CES charged a BlackBerry phone from around 30% to full in about an hour and a half.  Simply amazing, and cheap, expected to retail for about $40.