So far, already one person has asked me how on earth did I change my username, so I'll write it down.
So, click on your name at the top of the page (you know, Welcome, Name (click on name))
So push edit, and in the First Name, or Last Name bar, enter the new username of your choice!
Now push "Update Profile". Now push "Edit again". Under, "*Display name as:" push your new name!
That's it! I hope this helps whoever wanted to know this!
-Webmaster
NOTE: YOU STILL SIGN IN AS YOUR OLD NAME, YOU JUST APPEAR AS THE NEW NAME!