That is awesome! I've had the idea for the past few years of making a social search engine, where the only results are pages tagged by people in your "friends" list and several degrees outwards from that.

I never had any interest in actually building the idea, so it's amazing to see something similar hit the market.

When you implement that, an important thing to keep in mind is that "people" are usually a mix of interests. (E.g. if you followed me, you'd get a large helping of browser tech, photography, 3D printing, human rights work, and fashion).

It might be a better idea to allow people to curate search lists by interests and share those focused lists.

People are more interesting in the sense of "of your six closest friends, 5 vouched for this site" when a site/search result pops up.