Once and future late-night afterthought Jimmy Fallon hit his stride on his second day of videoblogging, treating viewers to an early glimpse of the set of his show and reacting gleefully about the Leno news—

a move essentially relegating him to the role of Rockefeller Center's afterhours janitor.

("Leno goes on for an hour, then the news, then Conan for another hour, and we're just ramping it up! People are going to be ready for another hour of talk.") But he also introduced a feature we hope becomes a staple both online and on the air: Vicious commenter mailbag!

"Douchebag" or not, Fallon seems to have rebounded pretty quickly from the brutalizing that continues to plague his early preparations for his show, suggesting that a regular appearance by his anonymous tormentors may be worthy, entertaining 45 seconds of nightly fill. Plus they're easy to book and won't trash the green room. That said, Jimmy, proceed with caution: As one friend of Defamer can attest from experience, all that mounting negativity can produce an awfully slippery slope. Come to think of it, maybe you should save it for your imminent late-career reality show. Your call.