Add fields for action dates and destruction dates with search capability and reminders
These features would go a long way to making paperless a more viable option. Often a document is received which needs action at a future date (e.g. an invoice). Even if it is scanned, the hard copy is kept around as a reminder to deal with it at some time in the future. If there were reminders (which worked with task managers such as Outlook even) which prompted some action for a particular document, the hard copy could be discarded right away.
Also, as the repository fills up, many documents become obsolete and get in the way. If a destruction date could be set with an option for auto-destruct or prompt that would help keep the repository clean and efficient.