I was talking to a customer at TechED NZ who asked if there was a simple way to chart data from a SharePoint list. Thanks to VisiFire and the SharePoint Designer blog, I was able to throw this live demo together in a few minutes using the Data View web part. http://www.wssdemo.com/Pages/graph.aspx

VisiFire supports animating the chart build, mouse-over datapoint details and lots more.

If you can't install Silverlight on your corporate desktop, this is what you are missing out on...