[Plugin: Recent Revisions] works great! does exactly what it says

This plug-in does exactly what it says—shows you all the recent revisions, across all your various posts, even if they’re by different authors. I couldn’t find anything else like this out there.

It’s at the top of my dashboard now, so I can keep track of what’s been changed on my site.

http://wordpress.org/extend/plugins/recent-revisions/