I was planning on blogging and doing a round-up of reactions to Jeff Bezos' announcement that ebook editions are outselling hardcovers at Amazon, but I found that someone did it faster and better. Guy LeCharles Gonzales has a great post on the Digital Book World site titled eBook vs. Hardcover: Beyond the Headlines. He also included links to articles by most of the major commentators, so I'll leave it to them.
Just one quick point: Bezos does say that Amazon's "hardcover sales continue to grow", so its not quite the end of the world.
While you are there check out what DBW has to tell us about Google Editions -- the next supposed 'game-changer' in the ebooks world.