This just came in from another customer, and it seems like a useful tip to share here in the forum community.

"Hi Catherine,

I have discovered a very cool program that has allowed me to stop
using CalDAV for my calendars, so I can sync iCal with Life Balance.
It is called BusySync (busysync.com, $20 shareware), and it allows
multiple Macs to sync their iCal calendars automatically over a LAN,
over the internet, or even with Google Calendars. I have set it up to
sync my family's calendars between our Macs, and to sync to Google
Calendar as well, so we (and our friends without iCal) can see our
schedules over the web.

The coolest part of this is that BusySync synchronizes plain old iCal
calendars, so SyncServices (and therefore Life Balance) work with our
calendars, even though we are keeping the synchronized with each
other. I thought you'd be interested, and maybe could pass along the
tip to others who are having trouble with CalDAV calendars and Life
Balance.

— Andre"