A group of music bloggers has formed the Music Blog Network to help marketers target the blogs' music fans, AdRants reports. The network has nine member blogs, which focus on the music industry. That number will increase to some 20 blogs, according to network organizer Jeff Davidson. Some of the original members of the network have been selling blog ads for a year or more, he says. Last month, a similar (but more generic) venture called Pajamas Media was launched to sell cross-blog ads. Eminem, Weezer, The Bravery, Touchstone Films, Random House Publishing, Sony Pictures, Lions' Gate Films and TBS have already advertised on various blogs to reach their engaged audiences.