That's a nice little app to see the relationships between journals, but I was expecting to see a Google-maps mashup where they ripped out the locations from pub

That's a nice little app to see the relationships between journals, but I was expecting to see a Google-maps mashup where they ripped out the locations from published papers then plotted areas of high intellectual concentration (pardon the pun), to show which areas of the world are focusing on certain topics. Also, for the rankings, they could rank fields based on how often papers are cited by other fields. For example, if a certain Mathematics paper is frequently quoted by physicists, it would contribute to Mathematics having a higher rating than Physics (over a large number of papers, a better average rating would emerge).