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Hi,
I think Bill Jelen (aka Mr. Excel) has the best on line tutorials, and they are completely free. I put a link to the list of the currently available tutorials below. There's over 100 of them.
I also put a link to the iTunes download in case you don't already have iTunes (also free), which is required to play the tutorials.
The tutorials are worth the bother of installing iTunes. They're excellent.
-Jim Gordon
http://360.yahoo.com/profile-i7JMeio7cqvhotIUwCzaJWq9