Have you ever had to restore a backup of a saved production copy of CRM Online? Let me tell you it’s not a fun process and until now unless you hit support at the right time you may have been out of luck.
CRM Online now offers backup for your instances, as you can see here they automatially run once a day but you can run another anytime you want. If you need to restore an instance just remember you may lose data. Make sure you check it out, you never know when its too late.