alot of hosts or dj's who run internet shows have contacted us, through myspace and email, but i dont think it would hurt to search google for internet radio and podcasts in your genre, and email any contact emails you can find with a brief description of your band, and links to your music (or an electronic press kit). Let them know that you need help exposing your music to more people.
You will find that these people who run these internet radio shows and podcasts are very supportive if they like your music. They generally do this because they are tired of whats on the radio, and want to find independant artists who they can listen to and push as an alternative to mainstream radio.
If your music is good enough, best believe you will get your music on internet stations and podcasts if you contact the people running the shows and let them hear your music.
I have had to electronically or physically sign a few contracts allowing people to broadcast our songs on a few of the bigger radio shows and podcasts like indiefeed network.
but the best way i would say would be to collect emails and links from your genre, and contact them 1 by 1.
