The Nike + iPod Sport Kit gets the press, but can it pull a Jack Bauer and get satellite tracking in the mix? Didn't think so. MotionLingo's US$149 Adeo Fitness Companion uses a GPS to track you while running/walking/skiing/snowboarding/biking, and verbally tells you how many calories you've burned, how far or fast you've gone, and how close the nearest hospital is. (Okay, I made up that last one, but it's not a bad idea.) If you've got to have a soundtrack while you feel the burn, you can connect your MP3 player to the Adeo's line-in.
With or without tunes, the Adeo hangs on to all the information it gathers, so once you've towelled off and plunked yourself in front of your PC or Mac, you can upload the data to the included MotionTrack software and keep track of your long-term progress.