Just saw this over on Daily Norseman. The higher-ups at SB Nation have heard the cries of so many re-located users (looking at you, Cardinal-in-Oregon), and you can now change your username without having to make a whole new account.
BUT! You can only use it once. So choose wisely.
It looks really easy, the link above has a step-by-step guide.
Oh yeah, ACC DAY!