Lil'Monkey has one. I use hers to message 2 of the members here.

We both don't like it much.

Kinda weird with people leaving you a message on your "wall" and a notification being sent to everyone on your friends list. Zero privacy with people on you list.

Also there are some people addicted to it. They change their staus or whatever that message is 100x a day. We could care less when someone brushed their teeth.

Just my 2c.