This is awesome. I've been playing around with d3 and the mercator map, but haven't been able to get this kind of interactivity. Great work!
Thanks! It was a lot of fun to work on, although I admit to several "bash head against wall" moments trying to get things working correctly.
D3 is pretty awesome to work with, but it isn't shy about exploding when you don't know what you are doing =)
Completely agree, I can get simple ones like bar graphs to work, but the maps always bow up on me. I'll definitely be going through your code and trying to figure out how it's done properly!