I don't think he's spot on, extremely close though. I think the skin tone is one shade too pale. Yes, Jim was very pale, but thats very very pale. Just a nitpick though. It'll look better with the texture.
I don't see anything bad with having an action figure of the Jim muppet, Palisades are in the business of making Muppet figures and it's a muppet Jim made. Now if they were to start making figures of Real life Jim Henson, or any of the dead guest stars - i think THAT kind of thing would be inappropiate and gross.
I guess if the club expands and support for the line builds even more maybe they'll be able to do the other Muppeteers, one a year or something. Not sure the others would sell anywhere near as much as Jim though and i guess they'd have to pay the people - personally the Muppeteer type figures don't really turn me on at all but then thats me.
As for me i'm still waiting for Dr Phil Van Neuter, Modern Gonzo, Vacation Rats Mini-Playset, Afro Kermit and a Clueless Morgan would be nice. Looking forward to seeing what Vacation Pepe is gonna turn out like with all the gear on (although i think the arms look ugly and the paint job the last time around was pretty naff) and can't wait to see the accessories i suggested for Clifford - the old style microphone and the clapper board. Aerosmiths directors chair was shown in a 'bit' and looked fantastic !