While mostly in the language of policy wonks, Congressional Research Service reports are extremely thorough and respected across the government as non-partisan. The CRS is basically the government's think tank, but its reports are unavailable to the public, even though the CRS has a working budget of about $100 million. Wikileaks managed to snag nearly 2,000 of these reports, topics running the very literal gamut of everything.
A font of government
Wikileaks got a hold of some 1,700 Congressional Research Service reports. Is this important? Very.