Buzz, Balls & Hype
MJ Rose’s excellent blog

Condalmo

Ron Silliman’s Blog
one of my favorite and most regular visits

Michael Hyatt, CEO of Thomas Nelson Publishers
Incisive, intelligent blog well worth bookmarking! 

Publishing Insider
The renowned Carl Lennertz covers the book business and more

Fresh Eyes Now
Robert Gray’s consistently interesting bookseller’s journal

Book Slut

The Long Tail
Chris Anderson’s ongoing exploration of how the web and human behavior creat new opportunities for information to be distributed (my words)

Galley Cat
Blog about the bookbusiness

Conversations in the Book Trade
interesting site

Flaming Grasshopper
Chelsea Green Press’ ongoing blog

Publishing 2.0: the (r)Evolution of Media
A blog about the (r)evolution of media, driven by the migration of media to the Web and new digital technologies by Scott Karp.  Highly recommended.

E-Reads
An e-book business site, but their blog covers book business stories as well.

The Digitalist 

"The Digitalist was originally conceived as an internal sounding board, discussion forum and blog for the publisher Pan Macmillan to start thinking about a range of digital issues it faced. It still is. Only now it’s open for everyone to join the debate about books, publishing, the web, and the future."  Highly Recommended reading for anyone interested in the future of publishing.