Mine is up and running - thanks!
http://javascriptweblog.wordpress.com
Without wishing to be narky, your use of this mark is inaccurate. Your material is not in the public domain, it is copyrighted to you. You should instead be using CC0, which is the appropriate mark for works still in copyright where the author wishes to disclaim all rights.
(And note that some part of copyright in major jurisdictions cannot be waived - look up moral rights)
This is why this new Mark will be fabulous for widely disseminated works for use in a low value environment. For a work to be properly usable in high value environments, such as for a film script, the players will still need to do expensive due dilligence. As the page for the public domain mark states, 'The work may not be free of known copyright restrictions'.
This isn't a criticism of the CC efforts, just a description of the problems created by the mess intellectual property is currently in.
You are just assuming he wants copyright, but it seems to me he doesn't.
He is not relinquishing copyright by using this mark, he is making a statement that he believes that no copyright attaches to the material. Two different things.
I'm not assuming that he wants copyright - he gets copyright whether he wants it or not. I'm assuming that he wants to licence his material as freely as possible. The correct way to do that is to licence his material under the CC0 or CC-BY licence.
In some countries that is not possible, but it is in the US.
I don't see where you are getting "no copyright attaches to the material" - are you trying to say you think he doesn't believe in copyright?
You are really assuming a whole lot here. I'm going with the simple definition: If I place a symbol on my works that marks them as "public domain", I abandoned my copyright.
It's the same as putting the word "free" on a couch you don't want.
CC0
Use this universal tool if you are a holder of copyright or database rights, and you wish to waive all your interests in your work worldwide.
Public Domain Mark
Use this tool if you have identified a work that is free of known copyright restrictions. Creative Commons does not recommend this tool for works that are restricted by copyright laws in one or more jurisdictions.
http://creativecommons.org/publicdomain/zero/1.0/
http://creativecommons.org/images/deed/nolaw.png
and
However the term 'public domain' refers to works where the copyright has expired or where the work did not meet the requirements to attract copyright to begin with.
This is the meaning used by the CC. They say in TFA that "The Public Domain Mark in its current form is intended for use with works that are free of known copyright around the world, primarily old works that are beyond the reach of copyright in all jurisdictions."
His website is not in the public domain in this (legal) sense.
I'm assuming exactly the same as you - that he wants to make his website as free as possible. The way for him to do this is to put his website under CC0 or CC-BY.
The reason CC0 exists is that placing something in the public domain is not possible in all countries.
However, I am not entirely sure about this, so clarification would be great.