MP3 is what I meant but didn't express too clearly. My reference was to the M4P files that iTunes offers.
Yes but whether you download from iTunes, Napster or any of the "legit" download services, you are going to end up with a DRM-infested file. It is not fair to punish Apple for their AAC (MP4) files when you get the same DRM crap in the Microsoft WMA files that the other services offer up.