NICK DOUGLAS — Going green is no longer the new black. Say hello to RF energy, a way to power cell-sized devices wirelessly. A startup named Powercast, according to PC Magazine, expects to release such technology next year. (Business 2.0 loves 'em.) Their big breakthrough? Pushing the amount of energy wasted in such a transfer from 90% down to, oh, 30-50%. Guess someone's not looking for funding from Al Gore.