SlideIt, is an intuitive method to input text on touch screen enabled
devices. Instead of tapping each letter, with SlideIt users simply
point to first letter of a word and slide the stylus to the subsequent
letters. Spacing is achieved by just lifting the stylus. Speeds of
more than 50 words per minute are easily achievable. Consumers love
the feel of writing quickly and accurately.

SlideIt is the first technology to combine three features: sliding,
prediction and graffiti.

http://mobiletextinput.com/Product/SlideIT/SlideIT.php

Dasur has also a strong keyboards for thumbs mode Thumbkey

http://mobiletextinput.com/Product/T...y/ThumbKey.php

Free strong demo and movies are available at website