This page is never actually accessed through Facebook UI. It is provided just so that you can verify that your server's mod_python configuration is working and that "Hello MiniFB.py" can import minifb.py and simplejson.py properly.
If you're seeing this page is being displayed you can move on, since it looks like its working.
Now you can move onto "Step 4. Set up your Facebook Application on Facebook.com" using the Facebook Developers Application