Swype is an intriguing new input method for touchscreens from one of the original inventors of the T9 text input method.
Basically, you have a keyboard displayed on the touchscreen and you drag the stylus from letter to letter to spell a word. You don’t lift the stylus off the screen until you’re done with the word. The technology tracks the positions at which you change directions, translates that to a letter, puts the letters together in order, and compares the resulting word to it’s dictionary.
Watch the short video for a demonstration. It’s incredibly fast!