Ok, I give up.
People who've never called tech support from a Mac or hate rants can stop reading.
The standard Mac meta-key is the Command key. They're the ones next to the space bar with the funny symbol and an Apple[tm] logo on them. Apple calls 'em the Command key. The documentation calls it a Command key.
Say 'Command-N' to a luser . Blank stare. Say 'Apple-N'. New window. Aaaaaaaaaargh.
Sometime this past weekend something died inside me . I gave up. I'm calling it the Apple key now. Fine.
 This nomenclature issue is a really good clue-meter in Apple shops. Anyone who knows this has gotten used to keyboard shortcuts, and that's good on any OS.
 Not the worst that coulda happened, I have enough ex-girlfriends to make a maudlin drinking binge really unpleasant for my friends. This one went by in 2 seconds and was unnoticeable to the outside world.