News.com has this report on South Korean start-up DreamFree, which introduced the Peeg, a peripheral for PDAs that is said to stimulate brain activity. Peeg, short for personal electroencephalogram, is designed to stimulate different types of brain waves by sending positive waves to the wearer. The Peeg consists of a software application for Microsoft Pocket PC, headphones and a set of silver eyeglasses. The lenses are made of opaque plastic.