Please read this speech by Admiral Gary Roughead, U.S Chief of Naval Operations (the CEO of the U.S. Navy).
I think it is one of the most important statements made by a leader of a major institution about the role of social media in our society. Kudos to Admiral Roughead and his very smart team, especially Commander Charlie Brown.
My message to CEOs everywhere: If the Navy can do this, with all of the real security issues that they face, then your company should be embarrassed not to be meeting this standard of excellence
(More detail on my blog: http://damniwish.com)