Facebook allowed on June,2009 to change the profile url from default format, difficult to remember url to easy to remember personalized profile addresses.
There are still new facebook users who have not changed their url and claimed their personalized profile url (vanity url).
When you start your facebook account your profile address would be something like this:
http://www.facebook.com/profile.php?id=109XXXXXXXX
You can get it personalized and get something personalize like mine new url is:
http://www.facebook.com/MohsinRasoolDotCom
i.e. You get facebook+username (you pick the username)
http://www.facebook.com/YourChosenName
This will help your friends remember the address of your facebook page(profile), and also it will help you rank your facebook profile account high in Google and other Search engines for your name and chosen keywords.
How to pick your personalized profile address:
Very simple, simply follow this url: and rest is easy to follow!
http://www.facebook.com/username
Have Digital Life at Facebook!
Mohsin Rasool