The Fansite http://facebook.com/ can't be saved. Possible reasons are:
1. The url is wrong
2. The site must have at least one fan.
3. The site has country or age restrictions. With these restrictions only users who are logged into facebook can visit your fansite. Please visit your fanseite and click on 'Edit Page'->'Manage Permissions' and delete the 'Country Restrictions' and set the 'Age Restrictions' to 'Anyone (13+)'.