This may be already possible but I would like to suggest it incase it is not.
Like others here I am using Notebook for GTD, although my system is varied from David Allen's. I have been thinking about making a tickler file in my Notebook, having a page for every month and every day in the month. I have an inbox page in my document as well and what I would like to do is have Notebook automatically move files and notes from those pages on their day to the inbox. Does this make sense to others?
Please let me know if this is possible, if not I would like to know what others think and if it could be done.