I don't know about you, but I would have loved to be a fly on the wall when Apple was negotiating its iTunes deals with the major record labels. We can't go back in time, but we can get an occasional glimpse of what it was like from those who were there. Such a person is exiting Warner Music Group chairman Edgar Bronfman Jr., who recently sat down with AllThingD's John Paczkowski and talked about digital music and Apple. Bronfman was optimistic about mobile devices like the iPhone and said mobile was "a massive opportunity for music." He acknowledged that the iPod kicked off por