How do I migrate my data from iCal to BusyCal?
When you first launch BusyCal, all of your iCal data is instantly imported. The data is actually imported from Sync Services, which is the underlying technology on Mac OS X that syncs calendar data between iCal, MobileMe, the iPad/iPhone/iPod Touch and other apps/services like BusyCal. Since BusyCal syncs with Sync Services, any changes you make to your calendars in BusyCal will continue to be synced with iCal. If you later decide not to use BusyCal, all of your data will be current in iCal.