Virtual laser keyboards reside in an extremely niche market, but that did not stop Korean company Celluon from introducing the CL850. With a size that is slightly larger than an iPod nano, the CL850 uses patented 3D electronic perception technology to know which key is being pressed, delivering an audio response via the built-in buzzer to keep the user on track. It works great with any Bluetooth-enabled UMPC, smartphones, and PDAs. The CL850 can be powered by a USB connection, the built-in lithium ion battery, or a direct AC adapter. It is capable of projecting a keyboard in the English, Spanish, German, French and Korean languages. There is no word on pricing and availability at the moment.