The computer industry is still working on the paperless office, but new short-range wireless technologies on tap for next year could at last bring about the cable-free desktop. The PC and consumer electronics industries have been talking up Certified Wireless USB (Universal Serial Bus) links as a replacement for those tried-and-true USB cables connecting the PC to everything from iPods to keyboards. Delays, unfortunately, have plagued more than a few companies trying to make this a reality. But by the end of this year, the products that rid your desktop of that tangle of wires should finally start hitting the market.