Chances are pretty good you’re already carrying around an old-school version of this camera. The Olympus Stylus line, which has been around for ten years, is the best-selling compact-camera series in the country. Its sleek curves have always trumped the boxier competition, and the Stylus’s palm-size scale makes it a 35-mm. camera you can actually carry everywhere. Now the Stylus has gone digital, with the new 300 model (shown; $399; 800-652-2666;