Re: Neck Woods
I think that maple fretboards are largely an artifact of the one-piece maple necks on Fenders. It was easier to manufacture since they didnt' have to laminate a fretboard onto the neck (even though the fretboard itself then needed to have finish applied). Conversely, on a mahogany neck, a maple fretboard means more work since finishing/buffing the fretboard takes more time than masking the edges of the fretboard. If you dig the tone of a maple board, you'd probably just go for an all maple neck, whether a slab or separate fretboard is used.
I'd expect the tone to be somewhere between that of a rosewood board and an ebony board, tending towards that of ebony.