Sorry to hear about his passing. He was a fixture on KCET about as long as I've lived in California. There are places I'd likely never have learned about had he not visited them on his show.
Did you know he had his very own Bond supervillain lair?
http://www.huffingtonpost.com/2010/01/11/huell-howsers-space-age-v_n_419153.html