From what i read rickshaw is based on d3. So if rickshaw essentially works as a high level wrapper around d3, then there is a possibility that we can get it working on older IEs with the usual d3 hacks.
Agree on this. Especially the shiny and good looking ones. For a technical crowd you can stick with a black line. For business the format is as important as the substance. Therefore, I can't see lots of applications for graphs libraries that don't support that piece of work that is IE.
