If I understand correctly, the calendars in the LastSync folder are the ones that iSync extracted the last time it sync'd. They're not necessarily up-to-date. Do you not have calendars in ~/Library/Calendars? That's where mine are in Panther.
Is there any way to display the current date in the dock in ICal 2.0 instead of the preset Jul. 17 date? On Panther, it displayed today's date when closed.