I don't have time to manage such a project. I don't think it's necessary anyway. The reason HN lacks x cool feature is not that I expend no energy on the site, but that I expend all my energy on what users actually care about, which is not features but the content.
No there aren't. YC founders' userids show up in orange to one another, and there is a page where they can see one anothers' submissions. There are no mechanisms to "boost" stories submitted by YC founders, nor does the voting ring detector discriminate.
Actually that's exactly what I thought when I saw the list yesterday. Several of those companies send people to Demo Day, and when I saw the list I thought: we should stop inviting them. So yes, we'll remove anyone from those companies from the Demo Day invite list.