Have successfully synced (actually overlaid) the two iCals in question....
Procedure, if I can remember correctly;
1. On "base" computer under the iCal 'file' tab select 'Export - iCal Archive'.
2. Select 'obvious/easy to find' location to save archive file'
...... The following step(s) depend on your network setup and/or connection
3. If you have "DropCopy" available and it is linked to your 'target' computer drop base computer archive file on 'Dropcopy' to pass it to target computer.
OR ( if you prefer)
If you are working from the 'target' computer, in the 'Finder' window go to the 'Go' tab and connect to the 'base' computer via the 'connect to server' method. This will allow you to 'get a hold' of the iCal archive file you saved in a convenient location and transfer it to another 'convenient' location on the 'target' computer.
4. On the 'target' computer go to the iCal 'file' tab and select 'import' again selecting the iCal Archive file you saved in a convenient location on the 'target' computer.
5. DONE!!!
6. REMEMBER THAT THIS PROCESS WILL OVERLAY THE iCAL DATA FROM THE 'BASE' COMPUTER TO THE iCAL FILE ON THE 'TARGET' COMPUTER!
You can create 'auxiliary' calendars on the 'target" computer to import into... your choice.
But it works very well and, ABD, it costs nothing...
This will also work if you are just connected via a 'sneaker net'.... just save the base iCal archive file to a USB thumb drive and transfer that to the 'Target" computer.
Bob K. rnkiii