What would be your ultimate set of Ridiculists for an episode? Try to keep it to a reasonable number - seven or less, I think - or it's meaningless.
I'd go with:
Lemon (As the official host, he really ties everyone together, and he's essentially the "face" of the podcast for me.)
John Toast (Excellent straight man; keeps things grounded. The Tom Servo of the podcast, if I may be so bold.)
Bunnybread (Kickass voice and a refreshingly non-Internet sense of humor.)
Portaxx (Queen of the nerds! Funny voices, too, and she's usually able to explain what the hell is going on when the subject matter gets really geeky.)
Acierocolotl (Funniest damn voice ever, hilarious when he gets mad.)
Squiddy McEnnui (For "My Malleable Mannequin" alone I want her to read every female - or "female" - section.)
Jimmyfranks (Great "announcer" and absolutely necessary for any fiction reading.)
It was tough having to leave out so many awesome Ridiculists, but it was a nice excuse to gush like a fanboy. :P Looking forward to what else people come up with!