This looks good, what about the non standard browsers (IE<9, what did you think?)? I have been looking into d3 a lot lately, but if there is no good support for IE, then no way this can be used for business apps.
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.
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.