Download and install Google Calendar Sync.
Pick 2 Way if you want to update google calendar and Outlook calendar.
This applications will allow you go sync up to Google Calendar and then using Iphone or Itouch you can see calendar either through Google App or through Safai.
Outlook can be used as a medium between Nokia phone Sync to get calendar syncing between Phone and Nokia Symbian.
Apple Mac ICal:
If your using Apple Snow Leopard you open iCal, go to preferences and account. Add new account and select google and input username “email@example.com” and password.
This will download calendar and add into ical, any updates from phone will go into Home or Business calendar.