Review: Dunnit for iPhone
This app finds a middle ground among to-do list managers, offering a simple and intuitive interface and a "just enough" approach to extra features (including integration with the OpenFeint gaming platform, so you can rack points as you tick off tasks.)
http://rss.macworld.com/click.phdo?i=e0d9f1ad90a0db3c3a428d5823b87a2e