I just got Family guy on DVD, so I know all the muppet references from season one and two.
From the episode the_great_gonzo was talking about:
(MEG and PETER are sitting on a bench in New York by an Ice Rink)
MEG: (Birdcalls)
(3 Seconds of silence)
BIG BIRD: Yeah, what'd want?
(Awkward silence from MEG and PETER)
BIG BIRD: You called me, right?
MEG: (half chuckling) No, I-
BIG BIRD: Oh, so this is funny to you? I can't fly, you know. I have to take the subway. Oh, I don't get stares. You make me sick (Spits on MEG, walks away) *****.
From The episode when the Griffins get their own reality show, and Meg is replaced by a sexier girl.
(The following has the camera look of MTV's The Real World. Chris is playing outside in the sprinkler as the camera films he and Peter)
PETER (With puppet MADAME, of "Solid Gold") : Hey, Camera guy, watch this! (to MADAME) Madame, your a lusty old broad!
PETER as MADAME: Darling, you're the one with your hand on my backside!
(The Camera now follows the more interest "MEG" as she joins CHRIS in the sprinkler)
PETER: Hey come back here! She's gonna sing "Rainbow Connection!"