The way this is laid out it looks like the entities that are in a row are associated, it's confusing. You name the columns at the top and label the ranks on the left.

I love the use of different-sized circles, but I feel like you're comparing apples to oranges in a way. I think the circles should all be relative to one master size (#1) only their own category; rather than comparing Ron Conway to Google his circle could be of equal size. This way when searching for entities their circles would make more sense because the user is aware of the consistent max circle size. By comparing Conway to Google you're giving up a wider scale you could be using for the Peoples' circles.

Still though, cool project. I found the 5-person startup I'm interning at this summer :) Makes for a great crash-course on who matters if someone were trying to study up on the startup scene.