thanks, very interesting article. it seems ebooks are really taking off finally. i found this statistic quite interesting :
Amazon’s Kindle version of “The Story of Edgar Sawtelle ” by David Wroblewski, a best seller recommended by Ms. Winfrey’s book club, now represents 23 percent of total Amazon sales of the book
mitigating circumstances mean it's probably not representative, but i think it might not be too far off either...