Recently, the latest calendar plug-in for Thunderbird (Lightning) was released and after the upgrade, I also added this Thunderbird plugin to allow bi-directional updates to Google Calendar directly from my Lightning calendar.
I did have to update my Thunderbird to make it work with the new plugin…so I was a bit behind the times. Here’s a quick video tutorial for how to make it all work: http://www.youtube.com/v/4_TnR1HlKkY.
I just got mine up and running. I’ll probably tweak it a bit.
If you are using another iCal application, you can check into using GCALDaemon to sync between Google Calendar and any other iCal format program — and you, too, can begin enjoying access to your calendar on your shiny new iPhone!