Date: 03-08-06 18:58
I would keep the backup server up to date with the same versions etc as in production. I would then use something like rsync to keep the web data in sync.
Note: this isn't a backup. rsync just keeps you a copy. One copy. If something is corrupted today, tomorrow after you run rsync, it'll be corrupted on your backup server too.
What you also need is backups.