I used to watch him at times. I thought he was fairly funny. I definately think he is Extroverted, Intuitive, Perceiving. He could go Feeling or Thinking, its hard to tell. Infact, Its hard to type many famous people, politicians, actors, etc. because they will always be pushing image.
But if you watch Conan closely, you can see that he looks for visible queues from people he interviews. ENFP's do that. Do ENTP's?
Man suffers only because he takes seriously what the gods made for fun - Watts