There's also gRaphael specifically for charting: http://g.raphaeljs.com/
Also, the article mentions that IE doesn't support the <canvas> tag. While this is true, you only need to add the excanvas JS library to use <canvas> in IE.
Also, the article mentions that IE doesn't support the <canvas> tag. While this is true, you only need to add the excanvas JS library to use <canvas> in IE.
However, I do wish that protovis is based on Raphael and jQuery.
It's worth the effort though - works on iPhone/iPad out of the box, and is super snappy even on OS X (unlike most Flash charting solutions, including Google Viz.)
but the demos are pretty impressive.