I shoot about 1,500 digital photos a year. To display them all -- or even a judicious array of masterworks -- would cost me a fortune in paper and ink and take every inch of wall space I have. So instead I cannibalized a 15-inch LCD monitor and built a digital-photo frame. Yes, I could have just bought one, but for several hundred bucks I would have gotten a snapshot-size screen and few expansion options. Mine has a custom-built frame, space for 25,000 pictures, and a full PC motherboard. With a wireless network card, I could feed it new photos over the Web. Or I could add an infrared module so it lights up only when somebody walks by. Heck, with its Linux OS, this thing could filter my e-mail and control my appliances. Here's how to start your own digital exhibition.