I'm trying to figure out how people are managing to send non-private messages to each other on Facebook. You see them as something like:
Ian Boyd ► Kirsten Guyer: Everyone can see this message.
example:

I want to know how to send a not-private message, so that I can learn how to send a private message.
Note: Sending a message is different than writing on a wall.
How do I send a not private message on Facebook?
