I mean I REALLY gotta get me one of these :)
Check it out - I just want one - it's even the right colour :D
http://www.youtube.com/watch?v=h8PlJTBSc_Y&feature=player_embedded
Many years ago I visited an organ museum (if my memory doesn't cheat me, this one: http://www.orgue.ch/anglais/index-e.htm (http://www.orgue.ch/anglais/index-e.htm)) and they explained how an organ works.
In particular they said that what's important for the sound is the shape of the pipes and the "labium".
The rest is pure aesthetics.
They played a Bach fugue on an organ then asked: what do you think about the sound of this organ?
We all, puzzled, answered "it's ok".
Well, the pipes were made by the pupils of the school using the center rolls of toilet paper and kitchen paper glued with adhesive tape...