• Ability to designate more timezones than the "10 in the pull-down + whatever timezone your computer is set to".
• Set custom recurrence rules (ie. Every week on Tuesdays and Thursdays)
• Access others' free-busy information
• Send and receive event invitations
• Calendar month view
• Have reminders pop-up even when Chandler isn't running
• Ability to specifying the number of hours you see displayed in the calendar summary pane without scrolling (currently the default, which is fixed is 12 hours) (Bug:4559)
• Go to date feature (type in a date and it goes directly there)
• How important do people think event status is? (we have a number of bugs - should we fix them?)
• Printing, day, week and detail view
• Preview area - should it have a preference to display more than just 5 items?
• Drag and Drop events to and from the all-day area (Bug:2801)
• Resize events in the all-day area
• View more information in event lozenges
• Support for more fuzzy dates: Some time this week, Some time this month, et cetera
• Date & Time Representation in Event Detail View

[Alec's] SWAG/implementation comments

• Month view is probably not hard, just a moderate amount of work before it would be usable
• Go to date would be very easy
• displaying a preference-set number of hours in the calendar view would be pretty easy
• reminders while chandler isn't running is probably pretty hard. It would require a separate program with access to the repository, which means it would have to quit when chandler started. In addition, that kind of thing is even harder to do cross-platform. Perhaps there could be a way to shut down the chandler UI and (hopefully) save some memory that way?
• printing of the day/week view is more or less there for "timed" events, but printing the combined all-day/timed view will probably be fairly tricky. It might be interesting to try to prioritize what people would use the most? A month view might actually be fairly easy once the month view UI is complete (i.e. just incremental work)
• Preview area change would be very easy
• D&D to/from the all day area is pretty easy
• Resize events in the all day area is pretty easy