[p0w3n3d]

One of the best UIs I've ever used was on Sony phone with a scroller-button. Scroller was to choose the option and button underneath (you pushed the scroller) was to select. Very fast, easy to learn and usable.

[enderfusion]

Same story with original ipod. Hugely underrated interface.

[rossant]

I agree, I still miss it 20 years later.