ePublishing is in its infancy, but it's an enormous infant and it's growing fast!
Last week alone, eBooks represented 22 percent of sales for Hachette Book Group (formerly Time Warner Books; parent of Little, Brown and Company; and the world's second largest publisher).
Last week alone, eBooks represented 19 percent of sales for Harper Collins US, and 11 percent for Harper Collins worldwide.
Last week alone, eBooks represented 17 percent of sales, $26 million, for Simon & Schuster worldwide.
Last week alone, eBooks represented 14 percent of sales, $16 million, for Harlequin Books.
(info from http://kathytemean.wordpress.com/2011/05/08/hodgepodge-of-publishing-industry-news/)