Scratch it!

I've been thinking a little of the idea of a context sensitive time navigator. Is there any use for such a thing? Isn't the good old scroll bar sufficient for that purpose? Maybe so. To test the idea, here's an example of how a time navigator, the turntable, could work in order to move in time. Spinning the inner circle allows the user to move in time at a faster pace than the outer circle. In an e-mail application the inner circle could represent moving by weeks, whereas the outer could a represent a more fine-grained period such as days. I don't know if a round time navigator like this would take too much space inside the frames of a mobile device. Maybe it's better to put it at the outside frame of the device? To be investigated...