I just noticed that I was able to login with my Google account to Google Calendar. So far it seems pretty awesome. I am, however, really missing a “to do list” function. But some cool things are the ability to make your events private or public, so it can be easily shared with others. You can also choose to be reminded of your events by e-mail or even SMS, if you live in the US that is and you can also import calendars from iCal or CSV (MS Outlook).
I am able to sign in to the calendar looks good.