Vice President Dick Cheney's hunting accident has already provided rich fodder for late-night comedians. On Tuesday it provided fodder for two keynoters at the RSA Conference. Microsoft chairman Bill Gates started his keynote with a jab at the vice president.

"My other invitation was to go quail hunting with Dick Cheney." he said. "I'm feeling very safe now."

Not to be outdone, Sun Microsystems Inc. CEO Scott McNealy, who delivered a keynote Tuesday, used Gates' comments to take a potshot at his rival: "He forgot to mention my invitation to go duck hunting with him," McNealy said to loud applause from the crowd.

What keeps security pros up at night

McNealy also offered this top 10 list of security managers' nightmares: