Google Calendar on Iphone

With the release of Iphone OS 3.0, syncing the main google calendar has become a breeze. Here is how to do it..
1. Go to Mail, Contacts and Calendar in "Settings"
2. Select "Add Account"3. Choose Other
4. Choose "Add CalDav Account"

5. Enter your google account details
Thats it!

This will not work for subcalendars in google. As far as I know, the only decent way to get both your main calendar and subcalendars is to use Nuevasync (you can find information on this from earlier post)