An alert FBvian passes along this link to Zap2it, where Guttenberg addresses the rumors that his Veronica Mars character is based on Cuban:
I do know Mark Cuban. I love his cigars. I know they’re illegal in the United States, but I love them. I always walk into a cigar place and say, ‘Do you have some Cubans?’ And they never do, that’s illegal, but you go to the back and you get a Cuban. And I put a little mark on mine. So I know it’s Cuban.