Lex Friedman has written an interesting article “How to switch to Google Calendar” on Macworld about moving form iCal to Google’s online offering.
The article covers creating a Google Calendar, creating a special browser window, importing your old iCal events, syncing the calendar to your iOS devices and how to share your calendar with others.
Full article: http://www.macworld.com/article/157778/2011/02/googlecal.html?lsrc=rss_main