Thank you, Daniel, for this excellent facility. I have had DB/File backups to DropBox for a year.
Today, I uploaded a file to my MediaWiki site and was informed that mw_index had crashed. MediaWiki does not have a comparable extension. It prompted me to add a daily DB Check/Optimise job to backWPup!
I have updated to the latest version with one small niggle; on the edit backWPup page I have a warning for DropBox Not Authenticated - I clicked the 'Authenticate' button and DropBox said "You have already allowed backWPup to access your files" but I still have the warning. Maybe it will go away when I update WP to 3.3.1
Thanks again for saving me the effort of downloading backups manually to my PC.