Garmin's latest sports watch is the most complete sporting watch we have seen to date. The Garmin Forerunner 910XT will help runners, walkers, swimmers, aerobics nuts, etc,
The Forerunner 910XT will track running/walking/biking distance, swim strokes, pool lengths, elevation, pace, speed, heart rate, and calories burned. This is "the" watch for the sporty types, no need to put on a specialized watch for each sport. The 910XT manages to pack all of this tech into a low-profile design.
The Garmin Forerunner 910XT is waterproof to 50m and has a 20 hour battery life. Another cool feature is the "virtual racer" which allows competitive athletes compete against themselves based on previous times. The 910XT is available for $400 here.