I love to recommend New America Media as a site to get a dynamic view of ethnic media in the U.S. Ethnic media stake out important cultural homesteads for racial/ethnic identity groups.
One organization that is committed to diversity in the media is Poynter, a media think-tank based in Florida. Great resources and workshops–I highly recommend it.
I serve as the graduate director for the Gaylord College of Journalism and Mass Communication. I spearheaded a re-design of our graduate program website, and thanks to the talent of people like Celia P., Bryan C., Sarah C. and Kelly S., it has become reality. Check it out and tell me what you think.
Megan Winkler writes a blog that is topical, sometimes funny, and always a good read. I highly recommend it.