Great information in this thread. Before I decided to use Toodledo (mostly because I can sync my itouch with multiple computers), I was using an app called Errands (developed by Yoctoville. It was free, I think-- link: http://itunes.apple.com/us/app/errands-to-do-list/id318095638?mt=8). It has a really nice checklist option for any task you create. There is an option that allows you to turn your notes for that task into a checklist [that I think is ] delimited by carriage returns. Although the appearance of the checklists is not customizable (you can't change things like font size), it works very nicely as a grocery shopping list, or a checklist for frequently repeated tasks, imho.