Yahoo Launches Blah Blah Blah and Then Cancels It 18 Months Later

Instead of updating your friends contact information when it changes, your friends just do it for themselves and then everyone with permission to get that information automatically has their address book updated.

No-one in their right mind would spend time building up any data-set in Yahoo because you can be guaranteed with the next bungee VP re-shuffle, it'll get canned.