now, the backup that runs nightly is only PART of what i do to make sure my phone is reflashable any time, though its the most important part.

i also use my git repo to track any and all configuration changes, by making the change directly in the repo and using my config scripts to make it happen on the phone.

check out this thread, where i describe in excruciating detail what i backup and what i restore, and how i no longer ever need to touch the phone to do all of it.

http://talk.maemo.org/showthread.php?t=91106