Look at THIS
I've seen the first two live (a mini version of the laser one used as a phone keyboard) and the Optimus on the net before, but not the rest and they look awefull... Maltron = cringe
I just looked at a roll up keyboard yesterday in a local computer store ad. I've seen some uber geeks using the wrist keyboard before, and even something similar to the Twiddler.
I think Das Keyboard ist stupid!