Just an FYI
In case you haven't seen Mark's blog (Check Your Username), you've got about four days left to make sure your username comforms to the new platform parameters. You might want to read the comments, questions and answers that follow on his blog also.
"your username a valid one that contains only A-Z, a-z, 0-9, hyphen(-), underscore(_) or period(.). Your new username must be between 3-30 characters long."
AND CONTAIN NO SPACES.