Neat idea. At first it wasn't completely obvious to me that you could click on a node to expand it. You might want to add just a little bit of text to help people out there.
Additionally, it seems that as the graph spreads to the right it disappears outside of the div and I can't find any way to click or scroll to keep following it horizontally.
A minimum is coming. I have a friend and colleague who's hopefully going to help me make the area of the circles be proportional to the size instead of the radius. Then we'll give it a minimum.
Additionally, it seems that as the graph spreads to the right it disappears outside of the div and I can't find any way to click or scroll to keep following it horizontally.