Synchronize with Google Calendar, so that I can syn it with other devices/programs, such as Thunderbird's lightning, PDA, ipad, so on...

I really hope there is some sort of synchronize feature with Google Calendar, or other popular cloud calendar. I don't use outlook, and the importing feature (using the LeaderTask website's iCal plugin) actually crashed the program when I tried to import from the Google Calendar iCal file.