The lack of IE support is what kills it for us. We need to do some charting stuff, and we'll probably end up extending gRaphael or Grafico or something and cop

The lack of IE support is what kills it for us. We need to do some charting stuff, and we'll probably end up extending gRaphael or Grafico or something and copying several of the Protovis charts. That said, how have you found the performance to be? Some of their demos are kind of slow, e.g. http://vis.stanford.edu/protovis/ex/candlestick.html http://vis.stanford.edu/protovis/ex/candlestick.html.