According to Hype Machine the most visited music blogs right now are:
stereogum (US)UK indie/Pop
3hive (US) alt.pop
Music (For Robots) (US)alt.dance/electronica
brooklynvegan (US) alt.indie/acoustic
Fluxblog (US) pop/disco/80's
Largehearted Boy (US)indie/rock/style
said the gramophone (PL/CA) alt. indie/rock
WFMU's Beware of the blog (US) indie/rock
aurgasm avant pop/alt indie
My Old Kentucky Blog (US) pop/indie/general
Submitting music to these blogs is relatively easy although you should ensure the music you're submitting is in tune with their music policy and in MP3 format. A picture (JPEG) and brief description is helpful. Generally they post a disclaimer to say the MP3 music is for preview purposes only. Most upload the file to a free host such as Fileden. If you don't agree to this then don't submit your track.
If you want further information please contact us.