Apple attempted to thwart Johansen's efforts, but that attempt failed.
Now comes Musik, the next generation of PyMusique, which adds support for Napster and continues to support iTunes.
Cody Brocious, one of the software developers for Musik, wrote on Apr. 13:
We have not finished reverse-engineering the license issues we’re having, but we’re getting close and we should have a release within the next few days so you can use your purchases songs on OS’s not supported by MS.Musik is available for download.
Hat tip: AfterDawn ("From PyMusique to Musik").