I created an account and let my browser or something fill in most of the fields because there was a bug in your sign up page where it wasn't showing what the fields were for and it wouldn't let me sign up if they were blank. Now I can sign in and I don't like the name it is displaying for me, but I can't change it or any other information about my account because no such settings exist either in the "Profile" section or in the "Settings" section. I tried creating a new account instead but of course I can't create a new one with the same email address.
I think only site admins can rename users once they are created.
Please reply to this post with your new nickname, I'll make the change.