How can I map the "Archived" folder to "All Mail"? I would like to map the "Archived" folder that's created when you Archive mail to the "All Mail" folder in my Gmail account.  How can I do this?
For some reason stackexchange isn't letting me comment on the approved answer.

In any case, jtbandes' comment is incomplete, you have to set the custom app shortcut as:

"Message>Move To>All Mail"

Note the lack of spaces between the words. This is critical; it won't work otherwise. Simply typing "All Mail" will trigger multiple, redundantly named menu items with the keyboard shortcut. 

I've assigned mine to Command-Y to approximate the Gmail shortcut.

I learned this from a comment by LaraCroft_NYC at https://discussions.apple.com/thread/2572960?start=0&amp;tstart=0