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I've mentioned these before, but here's a picture of a virtual laser keyboard projected from a prototype Siemens phone.
I'm a little skeptical, but willing to give anything a shot. The keyboard problem is an increasingly problematic one as our devices shrink well past the size where you can include a real keyboard on the device. (I guess the Treo 600 form factor is about as small as you can go with a "real" keyboard - and it's even a little too small.) (via engadget)