Notes that can trigger email notifications according to date

From Gaby: in the dreamspace...I think it would be super nice if under settings in addition to selecting a go live or expiration date, I could select an update reminder date. So for example, if I know I have content that will need to be updated in six months I could get a ping about it. I know I can also do this on my calendar.

As an author, I'd like the ability to add a reminder to a note, so that I can update/remove/ or otherwise edit content according to a schedule. Presumably, this would allow a set a reminder setting to be added per note, which would send an email to the author with the content of the note, on the date the author selected.