Another option that would add a great deal of power to OF would be to be able to choose where/how an OF item is treated within iCal - as a task OR as an event.
Some of us work better with task lists as iCal presents them, and some better in events. I happen to use both, but lean more heavily on events. Generating enormous iCal task lists doesn't do me much good.
My 0.02 for Omni