Forum Moderators: skibum
Sorry about the previous post. Hope this is better.:)
You can also trade ads in your 'zine with others on similar topics. This can be done on a one-to-one basis, or there are newsletter exchanges, similar to banner exchange networks. I don't know how well they work, or any specific one to suggest, however.
Another idea is to trade banner space on your site, for ads in others' ezines.