"FlightView" offers a convenient on-line tool for following flights in near-real time. Simply enter the airline and flight number when requested, and FlightView will generate a map of the flight's progress.
It also provides information about whether the flight is delayed, on time, or early, and presents a visual depiction of the route being flown.
Next time family or friends are flying, give it a try!
Click on thumbnails to view full-sized screen shots.