As far as I am aware you would be buying a lenicsse to listen to that piece of music, wheras a CD you buy the lenicsse and the physical product. As far as I am aware iTunes currenty typically offers an 15-20% (20 if you are say Rolling stones or other influential act). You also have publishing revenue, tax and the money for the service to take into account.So I would say; tax (17.5%), Publishing might be about (10%), Money to record company/artist (upto 20%), which leaves in the region of 50% for iTunes and most other stores.The problem with these figures for the artist is that record companies and artists usually take a 50:50 split of the above 15-20%. leaving the artist anywhere between 7.5-10% of their rights in their own recorded music (and that percentage is then recouple to the record company before they earn anything).The 70:30 you talk of would be fantastic but as yet doesnt exist, as there is publishing costs, tax etc to think about. iTunes still claims it only makes money becuase of the iPod, and that if they took any less cut they would shut down the service as it wouldnt make business sense.