It's Mar-zo-key, with a long "o". Hell, they made a hat with it spelled out like that on it. If you want to say it any other way, go for it, but you're wrong.
it be quite hard to stop saying it like that since ive ben saying it like that for all my life (or untill i started biking) , and i havent had any problems on how i pronounce it yet ..
MARZ-AW-KEY. thats how wayne goss and like 50/50 people that i talked to in whistler say it
There was a video tour of the plant on a "ride guide" episode a while back and the italian guy running the tour said it that way ^^ so... I figure, if any one knew the correct way, it'd be an italian who works there.