http://crudcrud.blogspot.com/
Best of Scott's thrift-store rummages.
http://200lbu.blogspot.com/
Wide variety of ephemeral weirdness and puke with Tony Rettman's excellent writing.
http://cakeandpolka.blogspot.com/
Fatty Jubbo's wonderfully weird picks
http://agonyshorthand.blogspot.com/
No mp3's, but there's some of the best music writing to be read anywhere.
http://www.strangereaction.com/
Entire EP's and occasional LP's worth of rare punk and HC from the classic bootleggable era.
http://20jazzfunkgreats.blogspot.com/
UK-based blog with enthusiasm for all new sounds