iWeb Backup Professional
... Worried about losing your iWeb? No problem! iWeb Backup can backup your iWeb so that you Never lose it again. Make up to 20 backups of your iWeb so that your work is safe. The export feature lets you copy one of your backups so that it on your computer somewhere or an external hard drive or server.
The Restore feature allows you to restore the backups you have made. If you do not like the change you can always get the original iWeb back with just a few simple clicks thanks to iWeb Backup.