Anyone have any other recommendations for things to keep an eye out for?
Two of relevance, one which we've discussed before, and one we haven't:
1) The Library of Congress, along with UCLA, received the bulk of the kinescope library of Goodson-Todman Productions- spreadsheets of the collection are linked to
here, and it includes quite a bit that has never been rebroadcast.
2) As part of the Library of Congress's holdings of the NBC Collection, there are episodes of game shows (as demonstrated
here)- however, while the radio end of the NBC Collection has been well-indexed, there seems to be no public information concerning the television holdings, so I have no clue how substantial these materials are.