Nah, I was responsible for wikilovesmonuments.org - premade, but with some modifications. I can pass on info for that one - I'm not sure about the US one though.
 
User:Mono
 

Date: Mon, 17 Jun 2013 15:41:04 -0400
From: svenmanguard@gmail.com
To: wikilovesmonuments@lists.wikimedia.org
Subject: Re: [Wiki Loves Monuments] WP themes

Mono did it up himself, IIRC.

On Jun 17, 2013 3:39 PM, "Vacio" <vacio@riseup.net> wrote:
Hi,

Does anyone know which WP theme is used for the US website? (http://wikilovesmonuments.us/)

Regards,
Vacio

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