Wasn't keen on the current TODO look so I changed mine a bit, transparent toolbar at the top listing your categories which doesn't scroll off screen and some nice colour coding on the headers.
screenshots: http://dieneuemodern.com/postmodern/todo1.png http://dieneuemodern.com/postmodern/todo2.png
download: http://dieneuemodern.com/postmodern/todo.zip
Enjoy!