The Google Chart API has just released a new version. Among the new features:

• No limit on the number of requests.
• Support for maps! USA state maps, other country maps, world maps, etc.

It’s quite slick. Click on the image on the right to see a chart of the states I’ve lived in (the lighter the color, the longer ago I lived there). The chart was built by simply crafting this URL.

There are some neat possibilities with this, especially since you don’t need to worry much about usage. More information can be found on the Mapperz blog

or by reading the official Google Chart API documentation.