The chaps over at Google have come up with a neat webservice - an easy way to get charts onto your webpages, the Google Chart API.
Google has finally released Google Charts API, which returns a PNG-format image in response to a URL. Several types of image can be generated: line, bar, and pie charts for example. For each image type you can specify attributes such as size, colors, and labels.
You can include a Chart API image in a webpage by embedding a URL within an
<img>tag. When the webpage is displayed in a browser the Chart API renders the image within the page.