When Facebook CEO Mark Zuckerberg was asked pointed questions about privacy breaches at last week's D8 Conference, he started sweating so much he had to take off his sweatshirt. Inside, was a strange symbol. What does it mean?

Mark Zuckerberg, the 26-year-old CEO of Facebook, was publicly interviewed on Wednesday at the D8 tech conference. How'd he do? Apparently, he got so nervous and sweaty answering questions about privacy that he had to take his trademark hoodie off.

We hear Steve Jobs has tentatively agreed to appear on stage at the Wall Street Journal's high-profile D Conference for the first time in three years. The June event could be a major landmark in the Apple CEO's public recuperation.