I have been looking for a shareable calendar that will allow me to add events and attach documents.So far, the only thing that has come close is the Freelancer calendar I demoed over at source forge.The only critical thing it was missing was the ability to attach documents. If anyone knows anything like this, your suggestion would be much appreciated.
If you have Kontact (from the KDE suite), you can email the free/busy information from your calendar and you can add attachments to specific events.