From Sarah Palin's delayed digital book to Disney's online book push, eBooks have dominated the headlines all week.

Keeping up with these changes, a number of new speakers have been added to the roster for mediabistro.com's upcoming eBook Summit which runs from December 15-16 at the New Yorker Hotel in New York City. Participants now include: DailyLit CEO Susan Danziger, Sony's Digital Reading Business Division President Steve Haber, Lexcycle co-founder Neelan Choksi; Google Books product manager Brandon Badger, author Katty Kay, and Books on Board CEO Bob Livolsi.

Here's more from the summit site: "Mediabistro.com's two-day eBook Summit will take a closer look at the changing digital publishing industry, from the perspectives of content creators and of publishers. Leaders in the field will uncover business development opportunities, and highlight the latest technological innovations currently driving the future of digital publishing."