good excel tutorial? - resource reference guide for Excel (Aug/26/2008 )

Does anyone know of a good resource for Excel tips/tricks geared towards researchers? Most of the tutorials and references I'm finding are for business and other fields.

Thanks!

Guidelines for Good Statistical graphics in Excel

[attachment=5193:Guidelin...Excel_1_.pdf]

Statistical analysis with Excel

[attachment=5194:Statisti...Excel_1_.pdf]

Excel for Scientist & Engineers by Dr Gerad Verschuuren. Published by Holy Macro! Books