Is this out of spite? Is it supposed to bring Mac users back to Windows? They must have a reason that's not "Oh yeah, Macs. We forgot about those." All they're doing is losing a lot of sales opportunities, because as much as I love Apple, I know I'm not the only Apple fan who's wanted a Zune.
And yes, I can install Windows, I can get VMWare Fusion or Parallels, but I'm not going that far just for an MP3 player. I don't want one that badly. And even if I ever do install Windows for some other reason, I think I'll still sit tight and wait for my Mac support. ITunes [and therefore the iPod] has been on Windows for some time, so why not return the favor? It'll sell at least one more Zune HD.