I read up on google a litle...
Just about 2 months ago...Twitter would allow you to switch your name to an inactive account (one not used in 9 months)....all you had to do was e-mail twitter at username @twitter.com and ask them. They changed that in late January 2009...
I believe they are figuring out now how to handle their usernames as I believe they realize how valuable they can be.
I tested it out and got this message:
Hi xxxx xxxxxx,
Due to high ticket volume, Twitter Support is unable to change usernames in cases of inactive accounts. Unless your user name issue involves Terms of Service violations, you'll have to wait until all inactive user names are released. We're working on a better long term solution for this.
* If your user name request concerns impersonation, trademark infringement, copyright, or another Terms of Service violation, please submit a request to the Terms of Service group via the web form. If you're unable to use our web form, please send your request to
[email protected] for help from our Terms of Service group.
Thanks!
Support
Twitter Support