Just a quickie here:
Playing around with Google's Chart API and honestly astonished at how simple it is to use and also amazed at the amount of complexity of customization options it offers.
Just a simple link:
http://chart.apis.google.com/chart?chs=600x300&cht=lxy&chd=t:1,1.370,5.137,10.111,53.780,65.369,92.584,100|1,25.2554,22.2512,22.2405,24.58504,25.3351,25.459,25.6906&chm=s,115511,0,-1,5,0&chxt=x,r&chxl=0:|2008-10-23|2008-11-03
Can generate the chart image attached.
Check it at out on http://code.google.com/apis/chart/