matleo, I didn't see that your list had only 32 Muppets. Of the ones you listed there, 2 were incorrect, so out of 33 you had 30 correct. (I realize that by saying this I'm confirming Sweetums as a character not depicted in the puzzle. Truth is, he was on my list of Muppets to include from the start but it all came down to the problem of his size. In keeping all the Muppets in scale with one another, he was HUGE and took up about 1/4th of the entire puzzle image with just his head. I played around for a while trying to have him peeking up from the background, but as the "background" of the image got increasingly filled with other Muppets, all that was really left as visible was one of his eyes. All in all, I prefered having 33 Muppets in the puzzle sans Sweetums instead of having around 25 including him.)
Beauregard, of the Muppets you named, 5 are not in the puzzle. But I will confirm that one of the 33 characters is indeed a Muppet penguin, so there's no need to worry.
I believe the price of the puzzle will be $11.95 and it comes in a cool collectible tin box. Look for images of the box and the puzzle image sometime next week here on MuppetCentral.