ButtonBar+ Restore 1.1Free
When you run ButtonBar Backup it asks you to name your backup file. Simply type a filename and all your bookmarks will be backed up to a folder in you Documents folder. When you run ButtonBar Restore, first of all, if Safari is running it will quit then you will see a list of all your backups. Select the one you want to restore and click OK. Safari will re-open and all your bookmarks will be restored.