Modifier key effects in Snow Leopard stacks

I tried using modifier keys with stacks in Snow Leopard and discovered a few interesting behaviors (at least, in grid view):

- Option-clicking a stack item will open the item but keep the stack open (which also keeps the Finder frontmost instead of the opening application).

- Command-clicking a stack item will reveal the item in the Finder.

- Option-Command-clicking a stack item will reveal the item in the Finder, but keep the stack open.

- Shift-clicking, as before, slows down animation considerably.

Another interesting behavior is that the scroll wheel is incredibly well tuned in stacks (non-linearly): you can nudge it slowly for very gradual changes, or spin it to scroll long distances.