Seldom enough I write about interfaces for wearable computing because there are not so many fresh ideas yet. However, this collection of "13 Computer keyboards you've never seen before" is fun and informative too.

The classic is: "The Twiddler2 is a pocket-sized mouse pointer plus a full-function keyboard in a single unit that fits neatly in either right or left hand." But you'll find others too like the funny "Tidy Tippist" or the "AlphaGrip".

Via 13 Computer keyboards you've never seen before