from http://news.com.com/DVD+Jon+reopens+iTunes+back+door/2100-1027_3-5630703.html:
'DVD Jon' reopens iTunes backdoor
A group of underground programmers has posted code online they say will reopen a backdoor in Apple Computer's iTunes store, allowing Linux computer users to purchase music free of copy protection.
The release comes just a day after Apple blocked a previous version of the program, called PyMusique, in part by requiring all iTunes customers to use the latest version of Apple's software.