Go to "User CP" (on the blue bar at the top)
Scroll down and look on the left hand side under "Blog".
Click on "Request Username"
Enter desired username and click "Request new user name"
Wait for Beverly to approve it.
Well, when I created BreakageInAtlanta thoughts of my hair breaking CONSUMED me so it was fitting at the time. But I wasn't thinking long term so I'm going by RoyalTee now. Kinda generic but it works.