I requested an email interview with the Boston U.S. census office. Here is their response:

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From: boston.pdsp@census.gov
Subject: Re: letter submitted to the New Hampshire Free Press
To: "Russell Kanning"
Date: Thursday, June 24, 2010, 11:45 AM

Please, feel free to send us questions.
We will be glad to work with you to inform your readers.

Thank you

Alexandra
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Here are the reader questions I sent to her:

What is the percentage of non-compliance?

Under what authority is the Census authorized to collect information beyond the number of residence per household?

Is it true that Census data was used to locate Japanese-Americans to round them up for internment camps. Was Arab-Americans information provided to Homeland Security?

Can you guaranty that census data will not end up on wikileaks?

Are census workers allowed to ignore "No Trespassing" signs?

original letter from Boston office:
http://newhampshirefreepress.com/node/622