Is it possible to create an iCal stream from Open Atrium's calendar feature? If so, how? I'm getting mixed signals around whether or not its possible to create an iCal feed from the Open Atrium Calendar Feature.

When I try creating a new view or adding a feed to an existing view, I don't see the option for an iCal feed...just RSS :(

Can someone point me in the right direction?

Some background: http://drupal.org/node/348871
I ended up making the feed in a custom module using the iCalCreator library. I did like this approach because I was able to be very selective with the events to include in the feed which was a requirement and the iCalCreator library was VERY easy to work with :D