The web address (URL) used for MobileMe has changed since earlier versions of iWeb. When you publish an existing website (one that you’ve already published with an older version of iWeb) for the first time using iWeb 3.0, MobileMe redirects visitors who use your old URL to your homepage at its new location.
Individual pages are not redirected, so bookmarks and links to individual pages will not work.
After you publish your site for the first time using iWeb 3.0, you see an announcement email you can send to your website visitors to let them know your site’s new URL.