The humour is good because you've got a show with a very tied and tested formula for begin funny- to make it funnier, you will probably (I think) have to step outside the show and the format to make it funnier. A key weak spot is the way you don't highlight the (I hate dissing my Heroes) essential repetitiveness of the show (you don't need o tune in regularly to realistically miss anything), because you don't allow for a more critical edge in your article, your writing becomes tarnished with the issue of the daily show (receptiveness). Similarly the whole thing reads too closely like an episode, you might want to branch out on the concept a little and add a little more to the characters within the series, or perhaps flag up the recent events with the writers strike.
I'm giving this a ten here, because it is a very difficult topic, subverting the humour of someone else to your own is difficult and there is probably a feature article here if you persevere with it. If I was writing this (as you like doing the self reference style) why not bring it "behind" the scenes and Jon Stewart mouthing off satire about his striking writers or personal life (something he's very secretive about, maybe something funny there to be made up)
Prose and formatting:
Good, needs a good proof read to pull some of the dialogue together, you capture the style of show well though prose and formatting, just general tidying, maybe stripping it back a little- that will probably make it more accessible. I think you also could use more punctuation to bring up the awkward silences of some guests when being interviewed by Stewart- I would not hurt to bring up some more negative characteristics of Stewart within the daily show and exploit for comic effect.
Needs more- I think that though images you will create a feel of the daily show within the article. at the comedy central website there are a few pics (could get a few doctored possibly?) that could be blown up to a good size to create a more "TV feel" than the look of a raw script you have currently.
You are (in my opinion) doing a great job with a difficult topic- with pics and a bit of tightening up you'll have a really good article
I hope I’ve been helpful- I do my best. Keep up with the article. If you want to bring up some point or anything just come and leave a note on mytalk page