In 2009 usernames were limited to 22 characters. However, there was a username made with over 30 characters that is probably the longest username. This username is 'Cantfindanamethatisnotalreadyusedsoiusedthisone'. You can view their profile from the related links.
There is Facebook page with the Longest Username than any other:ThisIsTheLongestUsernameOnThisSocialNetworkForSure
You will need to request a username change. See the related question below to find out how to change your WikiAnswers username.
No, you cannot have the letter Ä in a username on WikiAnswers. You will get the error message: "Invalid Username: Only letters, numbers and underscores are allowed!"
By your username and IP address.
When you sign up for WikiAnswers, you are asked to choose your own username and password; you can personalize it from there during the sign-up process.(See the Related question on how to become a member of WikiAnswers.)
You can make up a username.
WikiAnswers does not provide personal information.
Email Support@wikianswers.com and they will find it for you
These represent contributors who never registered an account with WikiAnswers. Thus they do not have a username to display.
His username is Chris. Here is his message board: http://wiki.answers.com/Q/User:Chris
The original creator of WikiAnswers, Chris, has the oldest account.
Yes, that is correct.