As long-distance companies watch their calls and profits slip away to rivals such as cellular phone networks, the day may soon come when their business -- once considered a pillar of American enterprise -- ceases to exist. WorldCom 1Q profit plunged 78%. ... call volume fell significantly, but revenue dropped even faster. Analyst: "At the end of the day, they're pretty much doomed. Long distance will be a memory." Long Distance May Face a Very Short Future | 
