I enjoy the graphs that have been included and have some suggestions for improvments.
1) When you click on the a slice on the pie chart it does not display the information associated it with it. It would be nice if you clicked on the graph the information associated with that segment would displayed once clicked.
2) I would like to be able to define the graph type and the information include on the axis. For example line graphs are better suited than bar charts for some types of information.