While these are pretty fun to explore, I couldn't help thinking, as I looked through these, that I was looking at both the future and the past. While the data is pretty cool, the presentation is so static. Why aren't these Google Maps overlays? Because splicing the two together takes programming skills. And soon either that won't be the case, or programming will be such a ubiquitous skill that such static renderings will be as anachronistic as flat HTML pages of the 1990s.
So, this is a bookmark for the future. Lets see if its still valid in 2015.