Note: this is a working htmlwidget first released in the Building Widgets htmlwidget-a-week project. sunburstR has already seen extensive use in many projects across multiple domains. If you have any interest in collaborating with me on this project or applying sunburstR, please let me know (see Time Isn't Money).
Easily make these interactive d3.js sequence sunburst charts in R modeled on this example from Kerry Rodden. For more details, see this post Week 26 | sunburstR from the BuildingWidgets blog.
See the examples.
These are still far from feature-complete. I would love your input, feedback, and comments.