Amcharts- Cool Charts Web Editor

Here is a really good website if you want to create charts for your website. It offers both flash as well as Silverlight charts.

http://extra.amcharts.com/editor/line/

This is an example of a Line Chart. Note since I am on wordpress.com I cant use Javascript so have pasted the screenshot-All you can do is paste the data from csv file, and even the swf file is hosted on their servers.