This would make a good three-disc set:
Disc 1:
all surviving episodes of Sam and Friends
Wilkins Coffee, IBM, Purina Do Chow, Wilsons Meat, and La Choy Chow Mein commercials
La Choy Chow mein industrial film
Wilsons Meat industrial films
Disc 2:
"I've Grown Accustomed to Your Face" (if the version from The Tonight Shiw still exists, then that would be ideal)
Scrapp Flyapp (the original version, I think it originated on The Today Show)
some of Rowlf's appearances on The Jimmy Dean Show (maybe the set can also advertise The Best of the Jimmy Dean Show releases)
some Rowlf sketches from Our Place
some Ed Sullivan Show sketches (hopefully Henson could get the music rights to some of the songs ommitted from the Muppets Magic DVD)
sketches from The Today Show
Limbo: The Organized Mind (I don't know where this originated)
Disc 3:
Timepiece (with commentary by Jane Henson, Frank Oz, Craig Shermin, and Karen Falk)
Youth '68
The Cube
Pat-Nik films: "Shrinkle and Stretchel" and "Shrinkenstein"
The Wizard of Id (maybe with a special introduction by the creator of the comic strip, if he is still alive)
footage shot for Cyclia (with either a special introduction or commentary)
A booklet would also be nice.