Talkinator now includes a beta feature (ok, all features are beta) to allow reserved names. Each room can have only one and the person owning the site (and cut and pasting the code) designates the reserved name and the password to access it.
If you already have a Talkinator in your site, just click the </> icon (i.e. get the code!) in the upper right of any talkinator chatbox and create your Talkinator with your reserved name!
Please let us know how it works and especially if you find any bugs! (email to firstname.lastname@example.org)