Have a Google Calendar and want to sync it with iCal? Check this out (via KFM).

Only works with Leopard (not a big deal) and will only sync calendars you own. The latter is a dealbreaker for me (Rachel and I share our Google Calendars, and I need to see both in iCal and on my iPhone) so I'm sticking with Spanning Sync for now. If you only have a single calendar, though, this looks pretty sweet.