It's really, really, really frustrating for someone who is trying to register to find out--after hitting Sign Up--that their chosen user name is taken. It means having not only to re-enter a new user name but also to re-enter the password and, most aggravating of all, to re-enter any captcha. Unchecking "announcements," etc., again, too. Is there a way to check for existing user names on sign-up so that folks don't get pissed off before they even get on the board as a member? Thanks.