Well, Johansen just updated PyMusique to work with the new version:
The iTunes Music Store recently stopped supporting iTunes versions below 4.7 in an attempt to shut out 3rd party clients. I have reverse engineered the iTMS 4.7 crypto which will once again enable 3rd party clients to communicate with the iTMS.
Prior posts: Apple Disables PyMusique iTunes Hack (Mar. 21, 2005) and PyMusique Software Program Strips DRM from iTunes (Mar. 22, 2005).
Can this trench war of programming hold up or will Apple reach for legal means this time?
Update (Mar. 23, 2005): More at Slashdot (Mar. 22, 2005 - "Jon Johansen Breaks iTunes DRM Yet Again"), Ars Technica (Mar. 22, 2005 - "DRM-free iTunes: wash, rinse, repeat?"), and Register ("iTunes store 'hole' open again").
Update (Mar. 24, 2005): PyMusique Project Statement (Mar. 21, 2005) (Hat tip: Alan Wexelblat).