For ask, how can you change your username?
I don't like my username its not right
http://help.ask.com/ics/support/KBAnswer.asp?questionID=67this article will tell you how :)
You can contact Customer Support in an email, and provide the top 3 usernames you would like to have (in case your first choice is taken). Expect it to be changed in 24 hours at the most :)http://help.ask.com/ics/support/ticketnewwizard.asp?style=classic