30 Rock is a Rip-Off of the Muppet Show - You know what, I never thought about it. But after reading this several-page blog outlining the similiarities, it's exactly the Muppet Show. Probably why I love the show so much. (p.s. Bring back the Muppet Show, whoever owns the muppets now!)
And then I just stumbled across this skit of 30 Rock which is allegedlyfrom Sesame Street. (can anyone verify?). If it is, It's a wonderful way to bring kids and parents together to watch the show and both enjoy it.