reminds me of the flatpicker who played at a fingerstyle camp. After he finished, a number of the other participants came and asked him about his unusual tuning, His response? E-A-D-G-B-E. (cue rimshot).I love many of Kottke's open tuned pieces. But at some point in his career he stopped using open tunings, even going so far as to disparage his pieces that employed them -- i.e.: pretty much the entire "Armadillo Album" and several of the albums that followed.
It seems as close he gets to an open tunings these days is dropped D.
There's always a couple good pieces on any of his albums, but to my ears the further he got from using open tunings the less interesting his music became.