Online audiences love sites that are good guides and filters. In my experience, it is usually more effective to publish content by e-mail than on the Web. That's too much to expect from most Web users. Start simply and grow gradually. Too many online content publishers bite off far more than they can chew.
Most media ventures take a long time to develop and become profitable.
This is why most of the big names in media are the oldest names in media. Content is a difficult business in any medium, because the people who want content generally are unwilling to pay what it costs to produce it. Any online publisher should expect that it will take some time to turn a profit. Avoid venture capital. Usually, venture capital is a very bad idea for online content businesses.