I'm currently running a slightly older WP version (3.1.3.) for http://www.brenau.edu because the host hasn't upgraded to the latest php yet.
We had a problem with the mySQL database bogging down the server. This plugin consolidated the posts and removing more than 6,000 post revisions in an instant. I checked the database with phpMyAdmin and it is much tighter and cleaner. I recommend making a donation to the author if you use this fine utility.
Rudi Kiefer, Ph.D.