Are there any social blog networking sites that have an emphasis on poetry and music?

Well you could create your very own social-network about poetry and music or ning.com

last.fm and imeem.com are awesome for finding similar music. As for poetry, deviantart.com is probably the best social-network for posting writings, poetry.

Sorry i dont know of anyone site that mashes up all these things

I have not actually used this site, but I heard lastfm.com is a social networking site where you can meet other people based on your music playlist.

@ggallucci: but its not a social network and has nothing to do with poetry or music

Here you go!

Poetry-Network
Got Poetry

The first one is more like a MySpace but for poetry, spoken word, and music. Hope it helps!