There’s a great thread currently running on Metafilter listing 89 music blogs which offer a wide range of excellent music to hear and enjoy. The music is all free and legal, and offered for streaming and/or download. Nice!
If you on occasion like wfmu’s Beware of the Blog, you’ll like these on occasion as well. Mostly strange, exotica, hip hop, noise, electronic, experimental, punk, industrial. No single-artist blogs. Updated seldom to constantly, all field tested at time of this post. Arranged alphabetically. All have free downloads. Some include videos, some contain images and sounds not appropriate to all ages or workplaces.