Think about ease of use here. It should allow people to "subscribe" to channels or categories rather than have to click, click, click to change channel/category

Think about ease of use here. It should allow people to "subscribe" to channels or categories rather than have to click, click, click to change channel/category. What they get is a "stream" of echos that are mixed together that they can filter out. If it's more CraigsList in nature, I don't think it will have the staying power.