My goals for the first beta release which will be the first public release are listed below.
I'm not going to do an alpha series this time around because this way I can pick up where v3 left off.

1. Real time iCalendar syncronization.
2. Ability to manage events over the web.
3. Users and Groups.
4. Recurring events.

This will make the web calendar useful to most people, including myself. Also included of course is localization support which is better than anything I've ever built, and customizing via templates is easier and more flexible than ever.

The current source is available from the subversion repository.