Plugins I need to look in to when I find some spare time...
BackWPUp - This is a great plugin I use often for client sites. I have included it in my own site at www.KISSyourWeb.com. Sometimes Backup Buddy won't run, depending on the server. I never have a problem with this plugin. It is still wise to make sure your server (Like Bluehost) is backing up your site routinely.
BackWPup can save complete installation to external Backup Service, like Dropbox or S3.