What technorati is actually counting is the number of new links on blogs to a title's Amazon entry, a somewhat mysterious measure of interest. Other things the geek world are reading : Da Vinci Code and Harry Potter. Travel books about Austria and Italy. Clive Barker's 2004 title, Days of Magic, Nights of War.
Another view of what people are reading is Library Journal's monthly list of The Books Most Borrowed in U.S. Libraries - Nonfiction (the fiction list is also available, but not nearly as entertaining.) The top five: The World Is Flat: A Brief History of the Twenty-first Century, Thomas L. Friedman ; Teacher Man, Frank McCourt ; Freakonomics: A Rogue Economist Explores the Hidden Side of Everything, Stephen J. Dubner ; Marley and Me, John Grogan ; Confessions of a Video Vixen, Karrine Steffans. Eee-too-bad. We don't have that last one in the database either.