Thank you, I see that now... it was unclear that I could just change it in that box and click save... that section looks like it's just about changing password (guess just conditioning from how other sites do it).
What happens if I change my username for existing links (like shortened URL's for instance) that point to speakerrate using my old username in the URL? Will that forward to the new one? That would be ideal. It would suck if changing the username just flat out causes a 404 on old links.