Dave Thomas is using RSS to track his to do list:
My most recent experiment was with the simple ToDo system in Apple's iCal application. I ended up with lots of ToDo's in there, but unless I left the iCal window open all the time, I kept forgetting them. I just didn't look at them often enough.
So, I spent the last 15 minutes writing a quick hack: a Ruby CGI that takes the ICalendar format .ics files that iCal produces, extracts the VTODO items, and reformats them as an RSS feed. I then subscribed to this list inside my aggregator, NetNewsWire. So far, I like the result: my ToDo items are just another list in my aggregator
That's a great idea. Unfortunately, I don't keep my to do's electronically, so I can't just parse them to RSS...