Visor
I own one of Handspring's (now PalmOne) Visor Edge PDAs. Unlike, the new PDA/SmartPhone/Camera/MP3Player/KitchenSink models, the Edge is a PDA. It uses PalmOS 3.5. It has no memory card slot, no network connection, no modem, no blue tooth, no cell phone, no color screen. Heck, the OS is even on ROM. Its a PDA. And it kicks ass! Its right around a quarter inch think, so fits in your pocket without any trouble. Its got a metallic cover, and stylus. The wieght and balance of both the PDA and the stylus make it cake to hold, I used it to take notes in my history class. And its about 3-4 weeks of daily use before I need to charge it again and it's charged in about an hour.