It's actually CIA.
Accel, an investor in Facebook has/had a few ties to In-Q-Tel, a venture capital company established by the CIA in 1999.
http://www.brainsturbator.com/articl...e_cia_and_you/
There are no smoking guns, but there are lots of questions and considering Facebook's mission -- to collect everything on everybody -- of course the CIA will have interest.
Google is friends with the CIA as well:
http://gizmodo.com/5599976/cia-and-g...ising-eyebrows
Keyhole, which is what Google Earth is powered by, was also an In-Q-Tel company before Google purchased it.