A weekly series by United Press International examining emerging wireless technologies. -- CHICAGO, June 11 (UPI) -- A moniker given to business travelers who lug a lot of computer gear with them through major airports from New York to Los Angeles and beyond -- road warriors -- is fast fading away. Advances in technology for personal digital assistants, made by Sony and other manufacturers, and for other wireless devices, such as the Blackberry, are making the notebook computer seem as dated as a manual typewriter. Faster processing power, in a package nearly as small as a mobile phone, with a...