I don't understand this. I've used jQuery.sparklines before, which I thought was HTML5, so I double checked that implementation, albeit with Chrome dev tools. It appears to be a canvas, but still has interactivity.

http://omnipotent.net/jquery.sparkline

Is that implementation compatible with your library? I'd love to be able to see exact datapoints.

Also, adding sparklines would make this a great all-in-one charting tool.