Shortcut?

Command + M

I prefer hiding an application with Command + H though.

 

Ditto that. It keeps my dock a lot neater.

 

Same. I just wish I could use Apple + M or Apple + H with Battlefield 1942.... doesnt work

 

1) System Preferences -> Keyboard and Mouse -> Keyboard shortcuts

2) Setup Expose' so any or all of the corners performs a hide (to show your desktop) - meaning just move your mouse to any defined corner.

-jim

 

They might just want to hide or minimize one application and not Show Deskop.

 

True. I didn't mean follow steps 1 and 2 which I listed - I meant either.

As to #2, just to expand on it a bit:

If they enable spaces then they can dedicate one space to a game or whatever major application looks best maximized. Then they can either click on any icon in the dock to change windows and spaces at the same time (let Leopard do the work) or go into a corner to dock all apps in that space to get to the desktop which could be desired in some situations.

Spaces are powerful if used in this manner, no shortcuts to remember and use the dock icons to switch back and forth, no need to hide/minimize anything.

-jim