Hurry.
Go get your facebook username.
If you don't know what it is, its like,
you know how last time your facebook link would be something like

http://www.facebook.com/profile.php?id=656304107&ref=mf
well now, you can have it as, http://www.facebook.com/johndoe

And its on a first came basis, so you better go hurry and get it, especially if your name is common.

for example, my brother's is http://www.facebook.com/davidchewje
hahahaha. friggin ugly.