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Reader response to articles is a great new feature. You can inprove it by making the responses threaded (like slashdot), that way the flow of response is not only reader to article, but reader to author, and reader to reader. Find a way to limit the threads so they don't go off in all directions. Right now the reader response is interesting, but with 100 responses to sort through it gets cumbersome.
You could also consider allowing readers to start their own blog under the Salon.com masthead. Blog content with high readership can be ported over to the salon site.
Consider adding more media types to articles. Instead of relying on an illustration and some copy, adding video and photo galleries and audio samples etc... could help a story.
Vote for the article we want: Users submit article concepts. These are narrowed down to one through polling/voting. Salon hires the appropriate writer to pursue the concept.
Thanks for even asking. Most news sources don't even have any way of responding at all and no interaction with it's readership.