"Your listeners become a passive audience - they have no power to skim, they can't skip the boring parts, they can't link or excerpt your post effectively. Your post becomes invisible to Google and other search engines. And anyone who has a hearing problem, or a dialup account, or doesn't speak yourlanguage too well, anyone who is trying to surf your site from the office, or from an Internet cafe - well, they're just plain out of luck." Right on.