[shaggyfrog]

Charting chord progressions definitely sounds interesting. Would also like to see that based on musical style -- i.e. "blues" vs. "rock".

[jschulenklopper]

Already done (but not per musical style). See http://mugglinworks.com/chordmaps/genmap.htm for a generic Chord Progression Map, and http://mugglinworks.com/chordmaps/chartmaps.htm for specific maps for all twelve keys.

[terryk88a]

That's an interesting site, very nice lessons. But one would have to actually read the material to understand the chart (grin). But that chart is getting on toward what I expected to see at the subject of this HN post.