The smallest GPS-enabled watch - Casio GPR-100

GPS receivers are getting smaller and smaller: this one fits on your wrist! Maybe there is some mass conspiracy to tackle an overweight epidemic among humans, or maybe folks these days are running just for the fun it, but regardless of the real agenda, Casio is cashing in on the statistically-driven-jogger craze by unveiling the GPR-100. Similar to other arm-dominating contraptions we've seen, this waterproof wristwatch syncs up with GPS satellites to calculate the time, speed, distance, pace, and averages of your run, while keeping track of your route should you deviate from the beaten path. Hailed as the "world's smallest GPS-enabled watch," the unit combines all the goodness found in your average wristwatch with the swank abilities of GPS in order to better analyze your exercise. You also get a "fully automatic" calendar, stopwatch, alarm, and even a backlight for those late night excursions. The biggest dig on this otherwise fanciful little timepiece is the battery life; the rechargeable LiOn apparently lasts just 2 hours in "normal operation," while legging out 4.3 hours in "low power mode." While this GPS watch will certainly attract less negative attention compared to earlier efforts, the compactness comes at a price -- at a whopping $476, you might be better off evading the GPR-100 entirely this September, and redirecting your energy (and cashflow) towards that tried and true Nike+iPod setup.