Facebook has always used random numbers to make up your profile page URL. This is not longer the case, with the introduction of Facebook usernames, you can now have your name in the URL instead of the random numbers.
See mine below.
Go to the http://www.facebook.com/username/ page and set you desired username. That’s all, now share your new easy to read profile.
Author comments are in a darker gray color for you to easily identify the posts author in the comments