I have a trial membership through MSDN and I can access audition mode in rb2. I don't have any files to test if i can actually play after transferring with magma however. If anyone has any files that can be sent to the xbox through magma, I can test to see if the trail membership works.
Audition mode works with the student trial of XNA and an Xbox Live Silver account.
Current DLC Count: 189
We need some Faith No More!