Bill R.: In the information security business, Bruce Schneier, who writes the Crypto-Gram is one of the best.
Crypto-Gram: The Risks of Cyberterrorism. Even during the war in Iraq, which was supposed to increase the risk dramatically, nothing happened. The impending cyberwar was a big dud. Don't congratulate our vigilant security, though; the alarm was caused by a misunderstanding of both the attackers and the attacks. [Tomalak's Realm]