Main EdgeWrite site (read this to learn how to write characters)
A paper on using EdgeWrite with joystick based systems
After reading the above links I wondered how well an EdgeWrite system would perform on the gp32. The result is that it works suprisingly well. After only a couple of days usage I can now enter text fairly quickly (around 10 words per minute) without looking at the gp32 at all, and hardly make any mistakes.
EdgePad is a basic text editor supporting edgewrite and the chatboard. Current version has the following features
32k(ish) file size limit
Character Chart (taken from www.edgewrite.com)