Hollow Press

Experimental, Noise, Ambient,
http://hollowpress.blogspot.com/

New Noise Net

Noise, Experimental, Drone, Indie
http://newnoisenet.blogspot.com/

Decrepit Tapes

Weirdo, Lo-fi & Fringe Music
http://decrepittapes.blogspot.com/

Vinyl Obscurity

Obscure New Wave

http://vinylobscurity.blogspot.com/

Krishnasgoldendopeshop

Doesn't update anymore but there's some great prog in there.

http://krishnasgoldendopeshop.blogspot.com/

Jolicoeur

In French, but some great obscure European stuff w/ full art scans. Post-Hardcore, Emo,

http://emojolicoeur.blogspot.com/

Mutant Sounds

Strange music from around the world

http://mutant-sounds.blogspot.com/

Monrakplengthai

Deep end of old fashioned Thai pop and folk.

http://monrakplengthai.blogspot.com/

holyfuckingshit40000

Indie Rock, Modern Psyche, Post-Rock. A classic blog.

http://holyfuckingshit40000.blogspot.com/

Tales ov Dryden

Experimental, Noise

http://talesovvdryden.blogspot.com/

Cosmic Hearse

Awesome Black Metal Blog

http://cosmichearse.blogspot.com/

no longer forgotten music

Experimental Music from the archives. Lotta material.

http://433rpm.blogspot.com/

Dusty Shelf

Great obscure Library Music
http://pornotrond.blogspot.com/

Synthetic

Modern Synth Pop, EBM, and Electronic
http://vesp-synthetic.blogspot.com/

Into the Prism

Lots of great Hypnagogic Pop, Chillwave, & Experimental
http://intotheprism.blogspot.com/

Flashing Light Will Blind Us

Indie, Experimental, Electronic, lots of good uploads
http://flashinglightwillblindus.blogspot.com/

Mutant Sounds

Library Music & Oddities from around the World
http://mutant-sounds.blogspot.com/

Lunar Atrium

Great library music and more
http://lunaratrium.blogspot.com/

Googlecore

Experimental music using the googlecore translator as a sampler? Why not!

http://googlecoremusic.blogspot.com/

id Reverberations

Mainly posting psychedelic, pop, garage rock obscurities, hip-hop, experimental music, and foreign obscurities.
http://idreverberations.blogspot.com/