I'm copying in what they said below (sorry it's so long).
Is the key point that the site was not rated? How do I get a site rated?
Also, I found out that not all blogs are blocked.
this site: http://ynotcostarica.com/
(not atahualpa theme) opens up fine
but my site: http://www.latinamericafocus.com/
The site in the message is a new one with basic WP installation, Atahualpa theme, & only Askimet, Yoast Seo, and jetpack plugins activated. I have some other plugins installed.
/// THEIR ANSWER ////
Submitted URL: http://www.cevichitos.com/
Suggested category: Unrated
Your comments: Please tell me what about the site is causing the block. The web page designer wants it to be viewable from government computers, and can change the design/format if the specific reasons for causing a block are known.
Reviewed: April 3, 2012 7:58:28 PM GMT
Thanks for submitting http://www.cevichitos.com/
to the Blue Coat WebFilter team for review. We appreciate the opportunity to provide the results of our analysis with you.
Based on your recommendation and after careful evaluation of the Web content submitted, a Web Content Analyst has categorized this URL as Restaurants/Dining/Food <http://sitereview.cwfservice.net/catdesc.jsp?catnum=64&catmap=0&locale=> .
Restaurants and similar sites fall under our Restaurants/Dining/Food category. This site was probably blocked before because it was not rated. If sites are blocked, you need to contact your local IT help desk.
Blue Coat does not select which category or categories are blocked or allowed. This decision is controlled by policy defined by our customers. If you feel that a certain category or site should be either blocked or allowed, click here <http://sitereview.cwfservice.net/sitereview.jsp?policy=view> to find out more about how to change your Internet access policy.
If you have any other questions that should be directed to the Blue Coat WebFilter team, feel free to reply to this message.
Thank you for being so helpful,