Henson use to be really cool, and I kind of made friends with some of there mail people.
I Still say Sesame Workshop is the best place to get in touch with a Muppeter. However I myself have never tried it. What I'm going to do is I'm going to use the addresses that we have with the exception of Henson, and write both Disney and Sesame to see if I can get an autograph from one Muppet, and one Muppeter from each. That way I'll be able to see who sends what and how fast. I'll keep everyone updated on how this little test goes. First I will be constructing the letter, it will be the same letter but the names will change.
For Sesame I'm going to send a letter to Grover, and to Eric Jacobson, and for Disney I'm going to send a letter to Kermit, and to Steve Whitmire. These are two of the more popular Muppets and performers, so it should interesting on what kind of response I get.