The story about the copyright on the Downing Street website seems to rumbling along, but something else has potentially now come to light. Not only does it look like they breached the Creative Commons License by failing to attribute the theme code of the site to the original designer, I'm now starting to wonder if they may have breached the GNU General Public License under which Wordpress is released aswell.
The basic principle of the GPL is that the code is free to use but if you modify it or customise it in anyway [and redistribute it*], you have to release those modifcations back under the GPL. I raise this because word reaches me that the company behind the Number 10 site, New Media Maze, have essentially said "its not just Wordpress" (which is not what was being said before) and there allegedly now claims that Wordpress has been modified for security reasons.
Under the GPL those changes [if you consider New Media redistributed them to Downing Street*] ought to have been released back into the community for review, and/or possible inclusion in version braches for the Wordpress source as it continues to be developed. The question is, has it? I guess that only New Media Maze will be able to confirm this, but given that they've used Open Source code then their changes are Open Source too.
It's also been brought to my attention that Downing Street are trying to claim that their copyright is for the content only and that the design and code (which is what, in essence, lays out the content) is not. Seems like they're trying to brush the issue of the original theme designer under the carpet, it is quite embarassing after all.
Open Sourcerer has noted ome other interesting stuff over here.
Update: * Insertions to keep the GPL pedants at bay.