I just had my friend join SWC and was trying to help with the game via MSN. He submitted a handle, which was approved, but once he figured out that he wanted to be a wookiee he wanted to change his name to something more, wookiee-ish, but couldn't find a way to do this.
Is it possible to change your original handle like it is when you die?
The only way for him to change his handle would be to die and then spawn with the name he desires. Unless his handle violates the rules, then it can be changed. The rules on handle restrictions can be found here: Handle Rules