Since nothing else has been said, I figured I'd let other WPers know that this plugin works!
DBC Backup has been running flawlessly for about a month on two different sites both running WordPress 2.5.1. One's a traditional blog and one is using WordPress as a CMS, so there's far more pages than posts on the latter site.
I actually used a backup from DBC Backup last week! A page editor accidentally deleted the page title from the site's homepage and when I went to manage pages I noticed there was a page with "(no title)." I thought a blank page had been inadvertently created so I deleted it without looking it at. (Dumb idea, I know) Didn't take long for me to figure out it was the homepage... But, it also didn't take long to restore the page from the backup created automatically that morning by DBC Backup!