One of the first tests for getting a job in the "IC" must be navigating their (necessarily) turgid websites... the NSA's job posting site is particularly cryptic (no pun intended).
Despite their web-monkeys' well-constrained attempts, there is obviously a lot of good 'product' here. The most popular open one being the CIA World Factbook 2005 (32.9Mb zip file)
Not much of a post, I know. But the aerial shot was fun.