Hacker News Reader

The vast majority of the US isn't in an urban area, where these would thrive (presuming they could get the distance thing down).

Edit: maybe not (see below).

Interesting, thanks for the research. I guess I shouldn't be too shocked, but it is a bit surprising (we have an enormous land mass).

Yeah, we have a lot of land, but you wouldn't want to live there...

I'm glad you don't. :).

Are you considering land mass or where people actually live? Large sections of the country are practically unpopulated.