Google Calendar já permite sincronizar com o iCal

The Google Calendar team is proud to announce the public release of our support for the CalDAV protocol. You can now use Apple iCal with your Google Calendar, so you can work even when you're offline, sync almost instantly, respond to invitations from others and see the free/busy data of your friends and coworkers.

We launched CalDAV support to our developers last July for feedback, and since that time a few of us whipped up a nifty setup program for iCal. This tool makes it a breeze to get iCal working with your Google account. We've released this as open source and the program is available for download at our Google Code site.