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Ever tried typing a really long message or editing your Word document over smartphone devices and PDAs? Most of the time, a small QWERTY keyboard will give you finger cramps while using a stylus to write a 10,000 word document isn't really the ideal way to go. The Wireless Laser Virtual Keyboard from ThinkGeek hopes to squash those problems by projecting a keyboard on any flat surface which then detects which button your finger hits. Just to ease the transition experience, the device even emits simulated key clicks. Too bad there's no way to simulate the tactile response that comes with the territory of a real keyboard. You can now be even more productive on your PDA or smartphone no matter where you are. The Laser Virtual Keyboard is roughly the size of a box of matches, measuring just 3.5" high. It is compatible with PalmOS 5, PocketPC 2003, Windows Smartphone, Symbian OS, and Windows 2000/XP, with limited support for Mac OSX. The rechargeable battery is good for 2 hours of continuous typing.

Pros : Looks cool, increases typing speed on small devices
Cons : Non-physical keyboard might turn people off

Wireless Laser Virtual Keyboard Source