Display additional fields (and sort by) in Entries in Control Panel
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