I can do it for you. Just send me an email via the ‘contact’ button up there ^^ and tell me what name you’d like to use.
By the way, our rules on name-changes have relaxed somewhat. Anyone can request a name change for any reason, at any point level. But: Generally, we’ll only change it once. So it’s best to give some serious thought to your new name because you’ll most likely have it forever. We require that you post your old name on your profile page for a while, until people get used to the new one.