if you are doing a full hardware build, yes a button is hard to move.
If you are making mockups with modeling materials,(wood, shaped plastics
or even clay to start with) the ability to change a button becomes much
easier. Very akin to paper prototyping which I would recommend to anyone.
> However, the hardware part is harder to do fully agile, when a button
> is place its hard to move around. You can't just refactor the hardware
> of iPod without considerable cost. But the paper (or in this case
> shiny white plastic) mockup could be done agile. And yes I think both
> hardware and software would be better.
> / Håkan Reis / Dotway <http://www.dotway.se> / http://blog.reis.se