As I am gathering a report that I want to present online I have been looking for alternatives to screen dumping Excel charts. Of couse Google had a tool for this. They are providing an API for generating pie, lines and what have you charts. The neat thing is that they are dynamic. No Flash Player or screen dumping required. Google hosts the generated image and you can feed in data on the fly. This is great when presenting live data online. The image below shows a dynamic pie chart.
You can read about Google chart API here.
Google Chart API and Chart Generator Tool is a great tool to try it out.
To explore the field more Mashable made a short review of different pie charts.