The future is here. Yes you read the heading correctly, you can carry a keyboard right there in your pocket.

The pictured device shows how it is possible to reflect on any flat surface a keyboard and connect that keyboard via bluetooth to a smart phone, PDA, or other device such as a laptop. When you place your fingers and press a key you hear a definite click for each key pressed.

Product Features

•  Virtual Keyboard connects to PDAs Smartphones and Computers using Bluetooth
•  Projects a full size keyboard onto any flat surface
•  Allows the convenience of regular keyboard typing in a tiny form factor
•  Rechargeable battery lasts for 120 minutes of continuous typing
•  Tiny size only 3.5 inches high
•  Compatible with PalmOS 5, PocketPC 2003, Windows Smartphone, Symbian OS, and Windows 2000/XP. Limited Mac OSX Support.

There, you see, at barely larger than a Matchbox, this device allows you to carry a keyboard in your pocket. For more information go to ThinkGeek "Bluetooth Laser Keyboard".