IEEE.org has a really nice overview of how Stuxnet worked. Simply sophisticated and terrifying. People think I don't like to put everything in Google because of Google. The truth is I don't like all of my life aggregated into one database because of things like Stuxnet.
This is still the dark ages in electronic surveillance but Google and Facebook are kings right now. I'd be an idiot to assume they are not at the top of the hit list for every criminal and government hacking group. I really do dislike the term "hacking". It sounds too benign.