Interesting idea... The problem is that you (or at least, I) can wind up missing changes like that in the XP nodelet, if you're clicking talk to send to the chatterbox, or you're previewing/posting a node, for instance.
I think the original suggestion was pretty good. If you haven't considered before (or even possibly frontpaged?), getting diverted to a page that refers to On Responsible Considerations or How do I moderate? (or Am I a power-mad Friar? :)) would not be a bad thing...
All we need now is to get a pmdev interested.