At the moment it is only possible to use cloned pages as a method of returning to a previous 'working' version of your site > otherwise you have to start over from reset all pages.
I also tried to clone site, but was unable to restore a clone to the same www directory.
It would be very useful to restore a site from a previous backup.
This is a great idea.
I "theme" my websites at certain times of the year (e.g. a "Christmas" theme at the respective time of the year) and under the current system, I must rebuild my websites from scratch if I want them to show in SitePad again for editing and tweaking (I download them, so I can obviously re-upload them to my websites)...