It isn't a completely elegant solution, requiring a secondary transmitter that will supply power when within range:
The system basically consists of two parts -- a wall-plug transmitter and a "dime-sized receiver" that handles the real magic -- and energy is instantly transmitted whenever that disc comes within a yard or so of its tag-team partner.
While this isn't the only solution out there, it has a lot of funding and some big names behind it, such as Philips. Back in January, Powercast talked about their creation. The potential for this is quite wide, and it would be fantastic to have wireless controllers, keyboards and mice that never need to be recharged. The units apparently are very cheap to produce, and the technology could be integrated in the future directly into devices. Interesting stuff.