"Unpublished authors, do you have a great book but can't find an agent? There's no excuse not to get that book out there independently and prove to yourself and to the world that there is an audience for your writing." --Agent Jenny Bent
So when I said the ebook is the new query last May, I guess my crystal ball was working pretty well.
But don't just jump in without a lot of prep. For some words to the wise on the subject, read Meghan Ward's blog, Writerland, today. She tells you how to be a successful ebook publisher. It involves having INVENTORY.