I have finally uploaded my Ajax Todo list so that others who want to can use it. There are a bunch of files so I zipped them all together into a zip file which can be downloaded from the page. It requires PHP and MySQL to work. A working example can be seen here: http://hesswebservices.com/download_scripts/TodoV1
This script is an extension to one found here.
More information (and eventually more scripts) can be found here.