I like my McNasty with a side of Sassy.
Oh, and since the download business is proposed to be worth several billion dollars annually within a handful of years, everyone is gambling that they can get people onto their system and keep them. It's all sorts of expensive to do well, and Apple is the leader in volume and execution and they are at zero profit. But that's what everyone is going for, it's a land grab right now and someone big like Wal-Mart or Dell marketing to their built in userbase for a product that they're taking a loss on for the next two years is still financially reasonable depending on how you stack the odds for this huge cashout in a few years.
There will be many more before it's over. Apple has its work cut out for it. I have little doubt that iTunes will remain the best implementation out there, but I'm preaching to the choir on quality products based on reliability and usability. many people buy the best promise at the lowest price, and those are the people that buy computers at Wal-Mart or from Dell, and the product doesn't have to do much more than convince the customer that they have something of value, and keep them from downloading any competing product.
It's not quite Sherman anti-trust, but it gets close. The whole default desktop, user takes what you give them type argument holding the merit that it does.