Nike+ Fuelband
For most of us with desk jobs, getting up and moving can be hard to remember, and most of us don't do it enough. The Nike+ Fuelband makes it easy and fun to track footsteps and other movements. The goal each day is to fill the meter up, watching it grow from red to yellow to green with every step taken.
The black wristband is chock full of goodies, including accelerometer, LED display and two batteries, that keep the band powered for up to four days. To track your progress, the band syncs to a great iOS app over Bluetooth. The app keeps a full history of your activity levels, building trends and offering tips and goals to continually improve your health.
It's not the most scientific movement/calorie/fitness tracker on the market, but it looks good and its integration with iOS is hard to beat.