A new charting library is on the block, this time working entirely with HTML5: rGraph.

RGraph is a HTML5 canvas graph library. It uses features that became available in HTML5 (specifically, the CANVAS tag) to produce a wide variety of graph types: bar chart, bi-polar chart (also known as an age frequency chart), donut chart, funnel chart, gantt chart, horizontal bar chart, LED display, line graph, meter, odometer, pie chart, progress bar, pseudo radar chart, scatter graph and traditional radar chart.

Using only HTML5 and Canvas means No Flash, which means they are viewable on an iPhone.  (Unfortunately, all of the interactive features are nonfunctional, overriden by Safari for use in Pan & Zoom).  Beta version is available now, with the first official release coming soon.

via RGraph: A HTML5 canvas graph library based on the HTML5 canvas tag.