Typically I use a second SME box running BACKUPPC to backup all my PC's and the ibays on SME. It works great, you never touch it. I also use rsync to push my SME data offsite for DR, this also works great with Dungog's utilities. BUT I'm trying to work windows server across a wan connection in the mix so rsync is the way to go but I'm having troubles with it on the windows side.
Rick