As the subject is different to the "page created by" and "page edited by" format, it would mean it's a completely new mail in Gmail. I could even set it up so that "wants your attention" flags the message as important. Perfect!

This could be abused though, to spam a particular user. Change a live template to include this:

[[user username!]]
%%content%%

And you have a problem — particularly if that user can't edit the template to remove their name.

So a way to block notifications from certain users or certain sites would be welcome, as well.