On one of the forums that I run, we'd like to notify everyone when an admin starts a new topic. Is there an easy way to do this?

I've been reading around, and I didn't find any easy way to do this, since it doesn't look like this is possible natively, the only other alternative I was thinking of seeing if there was a way to have people automatically subscribe (or have them subscribe themselves) to a certain topic tag, if possible. However if that is the case, is there a way to only allow admins to use certain topic tags, so that others can't use them, if that makes sense?