I think the file chooser, can learn a lot from the way Canola structures its menus:

Screenshot:

Video: (pay attention to menu)
http://openbossa.indt.org.br/canola/...a_settings.mp4

For those that haven't used Canola, this is how it works:
1) You click to open the menu, and one 'card' slides out.
2) If you click an item on that card, another card slides over the first. It doesn't cover it completely, but leaves the left most edge exposed.
3) To exit out of the current card, just click the screen outside of the card and it slides away.
4) If the menu has more items than screen, you can slide the options on the card via inertial scrolling.

This system should work well for:
1) FILE CHOOSERS
2) MAIN PROGRAM MENUS
3) POP-UP DIALOGS

Not only is it hyper functional, but finger-friendly, and extremely good looking all at the same time (with or without the animation).


YARR!
}:^)~

Clapt'n