Cross browser data visualization alternative to Protovis?

I built a chart similar to: http://vis.stanford.edu/protovis/ex/antibiotics-burtin.html using svgweb to make it work in IE8. The qu开发者_如何学编程ality is not that great and interaction is difficult to code.

Does anyone know of a cross-browser data visualization library that would be easier to work with yet achieve the same results (wedges of differing widths and lengths, json or csv driven data source, etc.)?

There's always D3.js. Many of the Protovis examples have been ported to use D3, and interaction is easier to code. It uses SVG, so you'll still need to do something special to deal with browsers that don't support SVG.