In response to the "Tan Aquatic" episode that everyone's been talking about (you know--"wrong-sounding Muppets"), Volume 5 came out on Tuesday and, as a huge Family Guy fan I ran out and bought it. I listened to the commentary for that episode first, particularly because I was interested to hear what they had to say about the Muppets and the guys on the commentary actually were discussing the reason Jim died. Someone (I think Seth MacFarlane but I can't remember) said "oh it was because it was against his religion, he was a Christian Scientist" or something and then another person said "see, I heard that he just had strep throat and never got it checked out" and they discussed it for a few minutes. It wasn't particularly funny or insightful--they didn't mention anything about the "wrong-sounding Muppets"--but it was interesting nonetheless.
Also, the person playing Fozzie at the end is Michael Clarke Duncan from The Green Mile and The Whole Nine Yards, among other movies.