ShapeWriter

Take a look at this touch screen writing methods. There are always a problem when I was using my PDA to type. The screen was too small to poke at individual key on the screen keyboard. The hand-writing recognition on windows mobile was awful, I couldn't get the correct words most of the time. May be this is the solutions to touch screen input. Not sure whether they support "1 hand typing", which I only need to use 1 hand in order to type.



They are also one of the finalist for Google Android challenge.
Download.com Blog on Google Android 50 Finalist.