Rapmetal Bart

Lots of discographies: RATM, Deftones, Slipknot, Tool, etc. http://rapmetal-bart.blogspot.com/

Metal Music

Huge list of Metal blogs and now other genres as well. http://rockshot.eu/musicblogs.html

Linkworld

Links for Metal, Hard Rock, and Nu-metal. Some discographies as well (George Thorogood, Van Halen, AC/DC, Iron Maiden...) http://linkyourstuff.blogspot.com/

Mp3 For All

Tons and tons of classic to modern rock.
http://mp34all-password.blogspot.com/

Boards of Electronica

New blog with Electronica http://boardsofelectronica.blogspot.com/index.html

Pearl Jam Web

Nothing but live Pearl Jam. http://pearljamweb.blogspot.com/

DiscosGrunge

Wow the Grunge blog I've always dreamed of. You will need Firefox & Java Enabled to see any of the archives (?) but do so! Only negative is they are 128 bit rate rips. http://discosgrunge.blogspot.com/

Eightfires Musica

Alternative, Metal, Electronica, and much much more http://eightfiresmusica.blogspot.com/index.html

Trip-Hop + Anime

EBTG discography and more trip-hop http://chandias.blogspot.com/index.html