I've been plugging away at my How to play
Slide in Standard tuning DVD ... it struck me why I love it so much: Standard is in fact a bunch of open tunings all rolled into one; the 2-3-4 stringset is major; the 1-2-3 stringset is minor, major 7th and 9th; the 2-3-4-5 stringset is 11th; the 1-2-3-4 stringset is open minor 7th; the 3-4-5 strinset is sus4 ... drop the low E to D and you've got a maj5 chord on stringset 4-5-6. They may not be six strings wide, but who says they have to be?
Back to work!