Then that username is already in use by another person.
Unfortunately since it is in use I can't hand you that username.
Sorry,
-Lee
CNET Community
I'm not sure if this is the right place to be posting this but I'd like to change my username from Tarvin_ to just Tarvin
When I joined it said Tarvin wasn't available but searches didn't reveal any posts by a Tarvin other than someone that had TarvinMarvin in their name.
I'll be starting an internet video series and Tarvin is my chosen pseudonym so I'd like to secure it since it seems to be unused and I intend use these forums to help me troubleshoot issues.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic