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Collection of 2008's Gadgets, Goods and Gizmos The Hand-Held Projector 3M beat other companies in the pocket-projector race by refining a well-known design instead of developing exotic technologies such as miniature lasers. Like many tabletop projectors, this model uses a set of prisms to direct light from a lamp onto an imaging chip that sets the color and intensity of each pixel in the projection. But rather than using separate lenses around the prisms, 3M molded prisms with rounded edges that act as built-in lenses. To keep power and size down, the projector's lamp is a one-watt LED with a special lens to concentrate the light beam so that none of it goes to waste. The 5.4-ounce MPro110 has inputs for laptops, digital cameras and cellphones to display video at standard-definition-TV quality (640 by 480 pixels). So it's not only a great tool for business presentations, but also the cheapest giant-screen TV. $360; 3m.com Camera that makes time Stand Still Casio Exilim EX-...