To assist a colleague, I compiled a list of helpful sites that often discuss e-books. As I compiled it, I realized that it's also a wonderful list for writers who want to read some of the most progressive and up-to-date thinking in the book publishing industry. This is obviously not an exhaustive list, just my favorites, so please throw in your own suggestions in the comments area.

Great Publishing Blogs by Progressive Thinkers

Joe Wikert's Publishing 2020 Blog
By Joe Wikert, VP and Executive Publisher at Wiley

PersonaNonData
By Michael Cairns at Information Media Partners
(former president of R.R. Bowker)

Print Is Dead
By author Jeff Gomez

O'Reilly Radar Publishing blog
A group blog by O'Reilly folks, including Tim O'Reilly