Backup entire ATV?

I know it’s possible to backup firmware signatures, but is it possible to backup the entire ATV?

I love my ATV (now that it has aTV Flash on it) and have spent a lot of time perfecting my little setup - complete with XBMC addons. Is it possible to backup the entire device?

I’d like to buy another ATV device for another room in the house soon and would love to just restore my configuration onto it.