O.K. guys, I dont' follow the scary science and for the moment I'm not even going to try to much as I'd love to understand but perhaps some of you would be interested to see Edward Lucy's site on tuning. He recons that 12 tone even-tempered tuning should be supplanted with a tuning system based more completely on overtones which he explains at some length on his website; along with all of theory there are also some transcriptions of popular melodies like Fur elise etc into Lucy Tuning. He even provides ratios of fret distances so people can make Lucy tuned guitars. Personally the challenge looks to scary to comprehend; 18 or 21 semitones per octave and hundreds more scales doesn't seems unatainable for me but it gives me a queesy feeling that we're using out moded (pun intended now i've spotted it) methods. Check it out, it's brilliant!

http://www.harmonics.com/lucy/ltindex.html