Google PhoneBook
Google has added a new feature.

Google has added the convenience of US street address and phone number lookup to the information we provide through our search box. You'll see publicly listed phone numbers and addresses at the top of results pages for searches that contain specific kinds of keywords.

Wow... type in anyone's phone number and get their full name, address, etc., as well as directions to their house via MapQuest or YahooMaps.
Cool feature... or invasion-of-privacy / security-risk? Well... it does appear that it is linked to the public phone directory, so if I can look you up in the phone book, I can do the same thing by hand. Just automates it for me.  And if your number is not listed, then it doesn't show up.
The world gets smaller all the time!