I've created a rule that sent an email using the Rules module with the last revision author to notify site admins. Maybe you can use something there.
> Message: 4
> Date: Tue, 22 Mar 2011 07:25:32 -0500
> From: "Joel Willers" <joel.willers@sigler.com>
> Subject: Re: [support] Showing revision user in a view> To: <support@drupal.org>
> Message-ID:
> <36B2D50F2A79114BBB96362C55C973FD0202F55C@mail.siglercompanies.com>
> Content-Type: text/plain; charset="Windows-1252"
>Thanks Joel, yes that's the problem, you can only show the original
> After answering, I realized that you were asking about revisions, not
> the author of the node. I didn't see an easy way to do that, sorry.
node creator and not the creator for the last revision. Might have to
try and understand the code and see if I can create a patch for it.