Facebook users will be able to choose username

On June 13, 2009 at 12.01 A.M (Eastern Time), you can grab a username of your choice that redirect to your Facebook profile. The social network will let users choose an alias or username for their profile on first come, first serve basis.

Requirement:

• Your profile must be live on Facebook to May 31, 2009
• Have a minimum 1,000 fans 

Guidelines:

• Create a username that is close as possible to your public figure and business name.
• Usernames are not transferable.

Note:
Once you have claimed a username by clicking the “Set Username” button, it is not possible to edit it, or to transfer your username to a different account on Facebook.

For more information, please visit here