Me too! I would also love to build this, and I've actually been thinking about it for ~5 years! This is one of the projects I was always planning to work on if I didn't need to worry about money. I don't want to monetize the site with ads, and I also didn't want to worry about chasing after donations. I was thinking that the core product could possibly be monetized for businesses to make better decisions, but that would be too risky (since most startups fail), and it would also dilute the vision (Wikipedia-scale fact database with weighted nodes and edges, to find answers and probabilities for humanity's biggest questions.) I should have really started working on it a long time ago.

I actually just started seriously thinking about it again over the last few weeks, so this HN comment thread is really surprising! I'm definitely interested in helping with development, and maybe sponsorship at some point in the future.

EDIT: This HN thread was the kick I needed to get started, although I don't know how much time I'll be able to spend on it. I'm really busy with my startup, so this will have to be an evening/weekend project for now. I've just registered FactGraph.org. (I'm not 100% sure about the name, but I haven't been able to think of any better names.)