I'd buy a hard copy book as soon as it was released. This blog has probably done more to change the way I think about the world than any other single source. Second in line would probably be Dennett. Your writings have already inspired me to go into philosophy(and hopefully avoid the traps that snared so many in that field).

The cover art is very funny - it'd also convey the idea of [a speaker in a clown suit speaking in mystic tones can be conveying truthful and useful information while the serious guy is a fool/liar]

However, it might get the book misplaced in the shops and possibly ignored by psuedo skeptical types or people that judge a book by its cover(although I think that is a useful heuristic).