iPod User #146;s Guide Introducing his iPod User #146;s Guide, the Wall Street Journal #146;s Walt Mossberg writes,  #147;By all accounts, millions of people will buy or receive Apple Computer #146;s iPod digital-music players this holiday season. The gadgets are beautifully designed and simple to operate, which is one reason they #146;re so popular, even after three years on the market and despite a rising number of competitors. #148; Dec 15