At the completion of my thesis paper, I was planning to publish my bibliography on this blog. I've been assuming that that post would instantly become the greatest resource on media effects, communications, and persuasion available on the internet.
I am no longer certain of that.
Communication Cache is a website storing hundreds of academic articles on these issues. I discovered it by noticing it in the URLs of many of the articles I found on Google Scholar. The categorization system is a little sloppy but this site is a massive addition to my arsenal of resources.