Greetings EE Folks,
There are a lot of posts by people looking for Expression Engine backup solutions. I recently put together a basic system for incremental backups of my Expression Engine site. It seems pretty useful, so I posted documentation on the wiki:
http://expressionengine.com/wiki/Incremental_Backups/
Assuming you are using a Unix/Linux host with access to Cron, rsync, and SSH, this setup would probably be useful for other content management tools as well.
Essentially, it creates daily incremental backups of both the database and site files. As my site includes both staging and live versions, I have included detailed notes for that as well.
Kind regards,
Paul