[realize]

It's an interesting idea. There is a possibility though, that Hacker News itself is the only HN-type site that can be successful.

What makes HN work isn't the software, it's the behaviour of the community, which vigorously votes up and flags spammy or off-topic posts. I imagine that a community of tech-minded hackers are the most suited for this activity. I imagine that a large majority of those visiting a fitness-related site would be less tech-savvy and logically-minded.

You are very likely to get a LOT of spam from advertisers, and if the community does not moderate it then you'd need super-users to do it. Maybe digg would be a better model?

[pjnewton]

That's a great point. I do enjoy the community here and how it self regulates for the most part and know that it's the community that makes this site work (and also great).

I like the Digg idea, I'll have to take a closer look over there. Thanks!