It has finally happened. Google has released their calander. They were even nice enough to include gmail integration, so now if someone sends you an invite via email, you can add it to your calendar just by clicking a button. It can even use google maps service to add a map if you like. It is quite easy to use, as well as to migrate to i.e. You can upload info from your iCal, Outlook, or Yahoo calendar with ease. It allows public sharing as well as notification by email or sms. But it looks like it will be a great app once it's out of Beta.