While what you have looks great, I've decided to use system imager and backup my servers (yes plural, only one web right now, but multiple stream servers). SI makes a fairly complete backup, and I provided the live disk to my colo operator. For remote it makes it easy, since if there were a need to reload, the system will contact my office and pull the server back up.
The nice part about it, I do a backup every 4 hours once the initial image is made, and we're considering doing it every hour. Not to mention, that if I should hose part of a system, I can use FTP and restore the old files in a heartbeat.
Big thanks to Falko for the idea, although I didn't use his howto (I really didn't need to, it's really well documented already) as I stubbornly refuse to use a deb system.