Guide to Excel charts

I haven’t had a chance to look through this website thoroughly yet, but on the surface, it looks quite cool:

http://peltiertech.com/WordPress/jons-excel-and-chart-pages/

It is self-described as: “Featuring one of the Internet’s most extensive collections of information, tutorials, tips, and tricks relating to effective and innovative charting in Microsoft Excel, with a few general Excel items as well.”