There was a place in Vermont that did that same corn cob smoking years ago.
Here is a link about woods and stuff in general includinig corn cob
http://www.recipetips.com/glossary-t...oking-wood.asp
And here is a great forum all about Smoking meats n other foods talking about corn cob smoking a little
http://www.smokingmeatforums.com/t/9...-pioneer-style