Scott Guthrie posted about a cool new ASP.NET server control: Chart. It can be used for free with ASP.NET 3.5 to enable rich browser-based charting scenarios.

Read more over here: http://weblogs.asp.net/scottgu/archive/2008/11/24/new-asp-net-charting-control-lt-asp-chart-runat-quot-server-quot-gt.aspx