It's somewhat similar to a bulletin board or a phone tree. This is an ideal way to share large amounts of information and documentation without sending it to individual users yourself and clogging their e-mail stream. If you can get it, a radio show on a community, college, or pirate radio station. If you can't, at least try creating PSAs. Radio not only allows you to spread information to regular and sometimes random listeners, you can even have lively debates and discussions as well.
Community radio is great for such things.
If you think you can break into the mainstream Media with such things, though, forget it. Go back to square one and read Manufacturing Consent by Ed Herman and Noam Chomsky. You might want to continue to place ads in local community and alternative newspapers letting folks know how to contact you and where and when you hold your meetings. Fresh energy keeps a group vibrant and of course, gives you more strength to work on your issue. If you make news, folks will want to contact you and this is yet another way they can do that.