[pjb]

It seems to work fine if I rearrange/group the calendars in iCal; they still sync back to OF. I currently have, among others, a group:

Business
--Work
--OF:Work

The names are historical and a work-in-progress but the way they work is: I can show my shift schedule in the Work calendar and my work related ToDo's in the OF:Work calendar while I'm at work and turn both off together at other times (like when I switch to the "Home" calendar group). A ToDo to set up a meeting may become a meeting on the calendar and get marked as a completed Task in OF. Keeping the calendar and the ToDo list separate but having only the ToDo list integrate with my OF Tasks works for me.

Anyway, I'd rather not have OF manage my iCal organization.