I’ve been looking for a tool like this. Though it is not what I need right now, it’s pretty slick.
I was recently trying to figure out a way to plot some live data fields for an animation of real data feeds. What an expensive process. Gather the data, compile the data, render the plot points and do it again, 12 times a second.
Check out Protovis: http://vis.stanford.edu/protovis/