Will iTunes shoot itself in the foot over variable pricing?

Along with the controversy about gay-themed books losing their ranking, Amazon has dropped some of their prices for music.  Not because they love consumers but for another reason.  iTunes finally caved to major label demands and added variable pricing to their songs, which means that some of the newer and hotter items are now costing over a dollar.  Now there’s some early evidence that the higher priced songs have dropped on the charts, according to Billboard.  The big labels had been pushing for variable pricing for a while now with Apple.  Careful what you wish for, eh?