Cool links!

[acoustic_guitar]

Best mode graphic on the internet:
http://www.people.fas.harvard.edu/~desmith/guitar/scales/major/key.htm

Very good chord theroy site:
http://www.harmony-central.com/Guitar/chord-and-theory-chart.txt


Cool Chord Finder
http://chordfind.com/

[Elmo45]

and stuff!