Display additional fields (and sort by) in Entries in Control Panel I have created a Calendar channel in the Control Panel.
I have added a field Calendar Date.

Is it possible to add that field to the Entries list and sort by it?

If I use the post date as the calendar date it will not display if it is in the future?
Not at the moment. Sorting by custom field in the back end entries screen is not yet implemented although I know it is definitely possible in the future based on the way the code is currently laid out. 

I would create a front end method to list and sort the entries with links into edit with cpEditUrl 

http://buildwithcraft.com/docs/templating/categorymodel#cpEditUrl