Add ability for admins (or certain authorized users) to send system-wide messages to users. This would be a message log system such that logged-in users would get the notification and users who hadn't been logged-in at the time would still be presented the message upon next log-in. Utilize a flag system so the user can mark the message as read and also use a validity date range so old unread messages wouldn't show for a user who hadn't read an old irrelevant message.
Guest
