This is a fork of Martin O'Leary's very interesting work with usability enhancements by Mark Kampe. I made this fork because I want to make savable maps I can create from presets and adjust on the fly.
In order to save the svg, I recommend NYT's crowbar bookmarklet.
Martin O'leary (mewo2), drawing on D3 and Adam Hooper's js-priority-queue.
This project is, from my perspective, finished.
The code is available under the MIT license, so you can fork it, improve it, learn from it, build upon it. However, I have no interest in maintaining it as an ongoing open source project, nor in providing support for it. Pull requests will be either ignored or closed.
If you do make something interesting with this code, please do still let me know! I'm sorry that I can't provide any support, but I am still genuinely interested in seeing creative applications of the code.