Since GMail released their small revision the other day that put a more "GMail-like" GUI on the Contacts section, I've been sorting and completing my list of contacts. I had 5 ambiguous e-mail addresses left that I couldn't pinpoint who they belonged to. After reading this article I decided to give this Facebook feature/vulnerability a try. 4 out of 5 previously anonymous e-mails are now verified with their first, last name, and photo (it turns out I know all 4 in person so in all likelihood the results are correct). Not too shabby, and a little bit scary.