Facebook is now launching username, so you can now get identified by a unique id. You might have been using the similar functionality previously on LinkedIn where you can have your unique id for url. It helps in the following manner:
- You have your unique identity on Facebook
- You can post your profile link easy like www.facebook.com/username
- You can be easily searched on search engines
Check out further details on this article Get your own Facebook Username

Thanks for the info!
I got my name as the username.
You don’t need 1,000 Fans to get your own username.
Your Facebook account must be registered before June 9 as the only criteria.
Mike
By: Mike on June 13, 2009
at 5:16 am