I just ran a little experiment, because I'm out of practice on that sort of thing and too lazy to use anything but Pandora and Rhapsody anymore.

Google searching for 'pink floyd the wall' and clicking the three most obvious links in order gets you a well seeded torrent file. None of the links on the page obviously lead you to somewhere to pay to stream/download the album legally (although there is an iTunes link for the movie at the bottom).

Pirates are still winning on convenience, let alone cost.