There seems to be quite a few websites dedicated to this product.
I'm sure there were a cough sweet called Zunes before. I know there's Tunes but I am positive there was one called Zunes.
Eitherway, with the dominance of Microsoft so blatant nowadays we need to remember the statement...
"History is written by the victors"
In this sense it is a shame such quality products as Vista and Zune will be associated with Microsoft products, even if they are completely unrelated. However given the size of Microsoft and the once size of Amiga, it's only a matter of time before products start repeating the names of y'ore...