QUOTE(pushpull @ Mar 16 2010, 12:00 PM)

And the advantage of that (other than profit margin) is what?
I know someone who uses a keyboard like that (but a different make). He finds it much nicer to type on, since the keys are where your fingers fall naturally. I don't use one, mostly because I don't want to spend £250 on a keyboard without trying it first, but I do use the Dvorak layout on my keyboard. Compared to QWERTY, it feels much nicer -- the layout makes keys that you often use together either next to each other on the keyboard, or on opposite sides so you can type them with alternating hands. The result is that it's much easier to type on, and there's less 'finger twisting' to find the right letters.
As to whether that could work for a piano keyboard... well, while I haven't tried it, the chromatic button accordion layout seems a lot more sensible than the piano keyboard, since like Dvorak, it puts keys you often use together, and it also lets you transpose between keys while retaining the same fingering. (Both for melody and chords.) But, as kenm says, using that for piano hammers may be difficult.