If you need a pocketable digi-cam that works in all the extremes you do -- from the aquatic expanse of water jogging class to the frigid wastelands at the ski lodge's heated terrace -- you traditionally haven't had many choices. Olympus is the biggest player with its SW series of non-flimsy Mju cameras (µ if you dig special chars), and is now extending and re-branding that line to reinforce its durable nature, completely dropping "SW" and instead going for the rather more apt label of "Tough," as in Mju Tough and Stylus Tough (monikers already applied to the lineup elsewhere on this hostile planet). The series will include options at varying levels of durability, with the lightweight on