So the idea is that for every subject area, there is an opportunity for someone to aggregate news and blogs and make money off it. <p>I have to disagree with Seth this time. There are already plenty of people doing this, and the reason more aren't doing it is because the ones who are aren't making any money.<p>Look at row2k.com, the most popular news site for rowers. Ed Hewitt is spending like 18 hours a day on that site, but only because he loves the sport so much, because pretty much the only income they get is from donations. The ads seem to barely cover the server expenses.<p>For any given blog subject matter there is a blog carnival that aggregates the best posts each week, and none of those seem to be making any money either.<p>It makes sense. Think about it. If even the biggest news aggregators like Digg and Reddit, which aggregate all stories, can't make any money, then what are the chances that a news aggregator that collects only a tiny slice of stories will be hugely profitable. Especially since Seth is talking about setting up ads. It simply isn't realistic.