Wristwatches are so 1992. Unless, of course, you're sporting a suddenly trendy iPod Nano watch. The new version's 1.5-inch square screen just so happens to be wrist-size, its digitized analog clock face makes it easy to tell time (assuming you remember what the big and little hands are pointing to), and a spring-loaded clip on the back allows you to easily attach it to a band, reports the Arizona Republic. One downside of the über-modern new timepiece? The battery only lasts 24 hours.