] The Cellular Telecommunications and Internet Association ] counted 140 million cellphone subscribers in this country ] in 2002 %u2014 a number that is sure to keep rising as ] cellphones become smaller, lighter and more versatile. ] ] One of the most popular new configurations is the ] cellphone with a built-in personal digital assistant. But ] that combination represents only a small fraction of what ] telecommunications or computer companies and independent ] inventors say cellphones can do. Fascinating stuff. New Functions for Cellphones |