Anyway, I have searched many an organizer and have found none that allow the creation of a smaller daily to do list easily...which is the number one thing to being productive when using lists...make the list manageable. They say you should never view your whole list while navigating the day.
It's interesting... (I've barely ever used the tasks feature in Outlook, Palm, iCal, or WM5) does the Task list thing on Palm have the easy ability to set the view to be tasks due today only? It's easy to sort by due date and view only open tasks on a WM5 device, but not to suppress showing tasks outside today.
iCal has the option to only show tasks that are due within the calendar view, though (so, e.g., if you are looking at a day-level calendar focused on today, you will not see tasks not due today).
I'm curious, though, about the "smaller daily to do list" ... if you set iCal to view only today's events and today's tasks, what is the purpose of having a "sublist" / what is the harm in having those tasks embedded at the top level in a larger list of tasks that don't have due dates today?
What I've always done, not that it's right, is to just make my tasks "all day" events in the main calendar....