I'm a big fan of 30 Rock because it was an unexpected comedy hit. I don't remember hearing a lot of hype for it, and it seemed to take a few episodes before people really started noticing it. But now they're in their second season and the show's still great.

NBC put up a bunch of bonus content online with behind-the-scenes footage, cast interviews, outtakes, etc. And once again I've found an un-hyped goldmine. Unfortunately they won't let you embed the video, so here's a few links: Any Arrested Development fan will want to check outtakes of Will Arnett seducing Kenneth and a multi-part interview with him. There's more outtakes here.

I thought the Ask Tina segments were pretty funny. One of the questions was "What do you think about the mixed reviews the show gets?" to which she answered, "I think the positive reviews about the show are right, and the negative reviews must have our show confused... ...with Studio 60." There's a couple of other Studio 60 jokes in there, but generally the questions and answers are pretty funny.

It's too bad it's not well-organized or easy to embed videos, but it's easy enough to click around in the popular videos to find more clips.