Check out the list...
A-List bloggers include: Eric Alterman, Atrios (Duncan Black) Ed Cone, Dave Winer, James Wolcott, Dan Gillmor, Henry Copeland, Arianna Huffington, Josh Marshall, Jay Rosen, Doc Searls, Kevin Sites, Stowe Boyd (Corante), Rafat Ali (Paid Content), Rick Bruner, Stewart Butterfield (Flickr), Ana Marie Cox (Wonkette), Cory Doctorow (Boing Boing), Seth Godin, Steve Hall (AdRants) Joi Ito, Joel Johnson (Gizmodo), Lawrence Lessig, Rob Malda (Slashdot), Markos Moulitsas (Daily Kos), Glenn Reynolds (instapundit), Peter Rojas (Engadget), Steve Rubel (Micropersuasion), Robert Scoble, David Sifry (Technorati), Biz Stone, Andrew Sullivan, Wil Wheaton, Evan Williams, Matthew Yglesias, and other fine bloggers.
Iddybud (Jude Camwell), Lenslinger, Billmon, Kevin Connors, Roxanne Cooper, Digby (Hullabaloo), Brad DeLong and Dave Beckwith (anonyMoses) made the C-List and Juan Cole, John Perry Barlow, Jerry Brown, Perry de Haviland, Esther Dyson, Joe Gandleman, Taegan Goddard, Tom Tomorrow, John Amato (CrooksAndLiars), Jerome Armstrong (MyDD), Stephen Baker (Blogspotting), Kevin Drum (Washington Monthly), Phillip Greenspun, Amanda Marcotte (Pandagon), Scaramouch (YesButNoButYes), Harry Shearer, David Sirota, and David Weinberger made the B-List. All are underrated.