They may have antitrust, but it won't be that big a problem if they include other media players but the iPod. If it's just exclusively their media player I could see it, but they could support a bunch of crappy media players and just not support the iPod.
I don't quite understand how antitrust works, but eh? I mean, it's their product, they can do what the fuck they want with it. If they don't support the iPod, it's because the iPod has virtually no documentation (that I know of) so how could M$ support it? Reverse engineer it? That's illegal.
As for vendor lock-in, Microsoft has basically done that already with Windows. Corporations really don't want to switch over to Unix because the API is so totally different that it would cost a bundle of money to migrate their programs over. And the Unix/Linux's are so fragmented over so many distros that they're all different in some way (libraries, headers, etc.) whereas Windows is centralized, so Unix -> Windows (what my dad does for a living) is simple versus Windows -> Unix, which is a lot more difficult. M$ also provides tech support for 10 years on their products, where in Linux you're forced to use the internet to search for answers.
God damnit, I butchered the topic again? :|