Kevin Rose of Digg came in to see us earlier today, and BusinessWeek tech reporter Doug Macmillan put some reader questions to the founder of the social news site. Among the topics addressed: tactics that Digg employs to prevent people gaming the site, and the kind of monetizing models that Web 2.0 execs could consider. Thanks to all for submitting their questions, and to Rose for lowering himself onto the hotseat.