I think he meant the admin - the ability to PM a notice to all members or just one group of members is essential (IMHO) - it would need to be a one way PM, similar to the welcome PM.
Often members emails are out of date - but at least their PM's will work.
However I would also like to see a method for deleting such emails after a set amount of time - otherwise the database size could increase out of control quite easily.
