You might see some of your Facebook profile information below. The page you just visited actually contained code that used holes in Facebook to get your profile data. Don't worry, none of your info has been stored - this time. But you may want to read more about privacy problems currently part of the Facebook Platform. If all of this concerns you, please share this link (http://theharmonyguy.com/facebook-privacy/) with friends to let them know about these problems as well. (Don't share the address of the page you're on right now.)
By the way, you may find that a certain recreational Facebook application has now been authorized on your profile. Check your applications and remove any that you don't normally use. Visit theharmonyguy.com for a basic explanation of this hack and for full technical details. You can also follow theharmonyguy on Twitter for further updates.
Previously, this area would be replaced by a user's Facebook profile information once the page loaded. The specific hole used to get the info has now been fixed, but the larger privacy problems still remain.