Yeah, I'm not keen on chording keyboards, and I'm an *accordion* player -- I'm *used* to playing chords with my right hand and navigating the 120 buttons on my left.

Chording keyboards break the Donald "Design of Everyday Things" Norman's priniciple of "keeping knowledge in the world, not the head". There's no simple way of marking a chording keyboard to show what all the possibilities are, so you have to memorize what different chords mean. Worse still, is that the chords are likely to change from application to application.

(Playing chords on a piano is a different thing entirely: each key always plays the same note, and spelling out a chord is a matter of learning music theory. Change one of the keys in the chord, and you'll still hear something related -- on a computer, changing a key in a chord could easily mean a completely unrelated command.)

As for the mouse, it's a horrible drawing tool, but I find it all right for text selection. Speaking as a user interface programmer, I'm curious as to what it is you don't like about the mouse -- what applications do you think it's suitable for, and what applications do you wish you had something else?