The long version of the story is
here. The gist: a Facebook server was misconfigured, leaking private pages out into the Interbutts to be happily indexed by Google, and as of this writing still open to the web.
So, if you throw the following into Google's search box:
site:http://69.63.186.30/you'll get presented with
a whole mess of private stuff. And you can narrow this down by throwing in other search terms after the above.
Some fun privacy-invading search terms to try out:
site:http://69.63.186.30/ "i was arrested for"
site:http://69.63.186.30/ "i hate my job"
site:http://69.63.186.30/ "my phone number is"
site:http://69.63.186.30/ "my address is"
site:http://69.63.186.30/ "i tested positive for"
If you're so inclined, I'm sure you can find lots of goodies before this hole gets closed, and those of you who actually use facebook might want to search for yourselves.