I run a knowledge engine project that actively mines facts from web-based sources and third-party data dumps. It was featured on the front page of HN a while ago, and has a total of $10 in funding (from a single donation; not a typo). I have, however, put a ton of time into it, and it's something I'm very passionate about. I'm fairly confident Wikipedia can have success making initial headway on their grant objectives with $250,000.

If anyone's interested, here's a demo of my own project: https://tuvalie.com/fae/?q=Albert%20Einstein