iTunes: 600 Millions USD for The Beatles?

After years of legal battles, Paul McCartney could have agreed on a contract allowing iTunes Store to offer all Beatles’s song catalog.
To obtain such exclusive partnership, Apple might have signed a big check: 600 millions USD, without counting the revenues generated by future cong/album sales.
It remains unclear when the Beatles’s albums will be available on the iTunes Store, but it will for sure take years for Apple to get money back on this investment.