Howdy all,
In the heat of getting ready for Texas Linux Fest, I darned near forgot about World Backup Day!
Today is the day when all good little boys and girls backup their precious data. A random bunch of redditors instigated and propagated the idea, and it even has a website: http://www.worldbackupday.net/
Virtualmin provides numerous mechanisms for backing up your data (local, S3, remote via FTP or ssh), so if you don't have a backup plan, now is the time to make one. Backing up domains is covered in the Virtualmin documentation: http://www.virtualmin.com/documentation/system/backup-and-restore
And, if you don't have a whole server backup plan in place, Webmin has the Filesystem Backup module (http://www.doxfer.com/Webmin/FilesystemBackup), as well as a module for Bacula. There's even a module for keeping a separate backup of your configuration files (http://www.doxfer.com/Webmin/BackupConfigurationFiles).
Hooray for backups!