Ah google, the benign giant of industry.  You really think they dont know everything about you? 

http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2008/03/29/BUQLUAP8L.DTL

"The system is modeled after Wikipedia, the public online, group-edited encyclopedia. However, the cloak-and-dagger version is maintained by the director of national intelligence and is accessible only to the CIA, FBI, National Security Agency and an alphabet soup of other intelligence agencies and offices.

Agents can log in, depending on their clearance, to Intellipedia's three tiers of service: top secret, secret and sensitive but unclassified. So far, 37,000 users have established accounts on the network, which contain 35,000 articles encompassing 200,000 pages, according to Dennehy.

Google supplies the computer servers that support the network, as well as the search software that allows users to sift through messages and data.

Dennehy declined to asses the quality of Google's products, but he applauded the contribution that Intellipedia can make to the government's work. Whether the network actually leads to better intelligence will largely depend on agents sharing some of their most important files and then their colleagues chiming in with incisive commentary - issues that are out of Google's hands. "