We are planning on using Confluence (running evaluation right now) as our internal website. So far it's looking awesome but something that would really do it for us is a shared/personal calendar that can be updated through the web interface and subscribed for example with iCal.

If this is not something that fits into Confluence, do you know if there are any third party plugins for this?

Cheers and thanks for a great product,
Mikael Hallendal