So do you stay logged in to it all the time and messages pop up as you receive them?
A bit like Windows Messenger, but with a web page? I have that on my PC of course, but it's permanently switched off - I don't really want people knowing when I'm logged on and sending messages all the time!
That is a feature of the site - But not the essence of it, its more like the PM system on this forum.
Imagine a forum and each thread is a person's page, which anyone can post on, provided you've been accepted as a friend to said person.
And then you can add different things to your thread, including info about you, and vids etc.
The main feature I like about Facebook is the photo system - Anyone can upload photos to facebook, and then note down the people in each picture, say there's a photo of a group of friends, people can look at the picture, and then note down the names of each person in the picture.
Next thing you know there's a notification on your page saying that someone's got a picture of you, you click it, and lo and behold there's a photo of you on a night out last week. And then anyone looking at your page, can look at any photos which you've been tagged in, so it jumps about every single photo with you in on the whole of the facebook archive, which if you have a lot of camera savvy friends, can mean seeing photos from looooads of albums - Its not rare to see people who have hundreds of photos of themselves around facebook - Simply because lots of their mates have camera phones etc.
