http://www.daskeyboard.com/

Since there is no key to look at when typing, your brain will quickly adapt and memorize the key positions and you will find yourself typing a lot faster with more accuracy in no time. It is amazing how slow typers almost double their speed and quick typers become blazing fast!

Individually Weighted Keyswitches

Most keyboards use a standard 55 grams of force required to register every key, Das Keyboard has 5 different levels of force. The keys are divided into groups and their feedback springs are weighted differently; from 35 grams to 80 grams, which correspond to the strength of the finger that touches the keys. The result is more comfort for your hands.