I would say that if you don't have any regular scheduled events such as seminars or podcasts.
Then the calendar would not be used for more that announcing birthdays which it also can display.
So it would be a waste of page space, other than another recreational feature like the shoutbox.
Now the calendar can be used as a private calendar per user.
But most people have a calendar feature on their desktop like outlook, Which is more dynamic in use for multiple recipients.
Also a island for advertising could be useful to the site.
I don't mean generic advertising, but ad's by amazing charts for new applications or releases for the product. So they are a reminder of what new products that Amazing Charts offers.
