This is interesting - a company called SlideIt is offering you a different way to enter text on your Windows Mobile phone. Instead of picking up your stylus when entering text, you just drag it from one letter to the next without picking it up. In this way, you save...what? Microseconds? It's definitely different, but I'm not sure it's better.
However, you can also use SlideIt do do tapping with prediction - something that might be more useful. As you tap the words out, a list of words appears on the left for you to choose from. A graffiti box is available for any characters that are not on the keyboard.