Edward Snowden might be safe in Russia, receiving awards from ex-U.S. intelligence officials, but the information he leaked as a contractor for the National Security Agency is still causing a stir.

The latest report? The NSA is collecting email address books and IM contact lists from both U.S. and foreign accounts, according to a document leaked to The Washington Post. This is not a small-scale operation. Up to 250 million contact lists are scooped up by the NSA every year, according to the Post, which adds up to "a sizable fraction of the world's e-mail and instant messaging accounts."

During a single day last year, the Post reports, the NSA collected the following number of email address books:

The email sweeps take place overseas, intelligence officials told the Post, but the NSA does collect the contacts of many Americans — possibly millions or even tens of millions of them.

The U.S. intelligence community denies it's collecting information on innocent Americans, claiming to the Post through a spokesperson that it's focused on "valid foreign intelligence targets like terrorists, human traffickers, and drug smugglers" and not on "personal information about ordinary Americans."

Still, this latest leak could hit home for a lot of Americans, mostly because the information gathered is less abstract than, say, bulk phone call metadata. Email address books can include a lot of personal information: Names and email addresses, and sometimes even street addresses, telephone numbers, and the first few lines of an email message.

For the average person, "the NSA can read your buddy list" is a much more alarming story than "the NSA has access to a global metadata search engine." This particular leaked slide might cause people to rethink chatting online. Here, a helpful chart from The Washington Post:

(Source: Washington Post)

(That's right: The NSA can apparently read your clever chat updates).

Today, despite President Barack Obama promising major steps towards transparency more than two months ago, the NSA more or less remains opaque.

Much of the political heat surrounding the NSA dissipated when Congress became distracted by Syria and then the government shutdown. But the shutdown drama won't last forever. When the government is running and the debt ceiling is raised, the media and members of Congress could turn their attention back to the NSA — and there might be plenty of controversial leaks waiting for them.

"There are a lot more stories," The Guardian's Glenn Greenwald said in Rio de Janeiro on Monday. "The archives are so complex and so deep and so shocking, that I think the most shocking and significant stories are the ones we are still working on, and have yet to publish."

Greenwald, speaking at an investigative journalism conference, said he was in daily contact with both Edward Snowden and U.S. filmmaker Laura Poitras, and that he was still digging through "thousands and thousands of documents."

Previously, that might have seen as bluster. But this recent leak is a sign that the White House might have plenty more questions to answer about how the NSA collects data and what it uses it for.