BillBoard: Digital tracks pose new problem for Billboard’s industry charts

“Rising sales of digital tracks through such services as iTunes Music Store and Napster are raising questions about how such transactions should be measured on the Billboard charts. […]

‘The consumer’s rapid and enthusiastic acceptance of iTunes and other download services gives great meaning to that data,” says Geoff Mayfield, Billboard director of charts.

“We will need to factor those transactions into The Billboard Hot 100 . .

. .’”