You’ve got to love those Google developers and that whole 20% time project thing they have going on.
One of the latest free offerings to stroll out of the Google labs is the Google Chart API, a really simple way to generate images of charts to easily embed in your website. Basically, you just set your image source as a formatted link with the chart parameters and it returns a PNG with the info
Here are some examples that use the number of blog posts broken down by month:
Pie Chart-
It also offers line charts, bar charts, 3d pie charts, and more.
http://code.google.com/apis/chart/
