I agree -- but this is a pretty content-free YC news story. This would be notable if the guy actually gets anywhere -- writing "I'm going to write a new OS" on your blog is the trivial part.
Because he felt like submitting. This is not a big deal. Consider it a discussion thread with an incidental link.
Well I think it is interesting. But I agree that it would be more particularly news worthy and notable if I had something more to show about it. I've been researching for 3 weeks and its going great.