When we first brought the Xanga 2.0 system up, Xanga sites like yours (that had been archived, but not migrated over) redirected back to the frontpage. That was pretty confusing (and scary!), so we changed things pretty quickly so that Xanga sites that hadn't migrated over showed the following page instead:
http://vita1107.xanga.com/

Hope that helps! The short version of that page is that your blog posts have been archived... they are definitely saved and available for a free download! You can download them by signing in here:
http://xanga.com/wp-login.php

Or alternatively, you can upgrade to Xanga 2.0 here if you'd like:
https://xanga.crowdhoster.com/relaunch-xanga