Jupiter expects online music industry revenues to quadruple over the next five years, to be worth $3.3bn by 2008, when web sales will account for one in four record purchases. Jupiter does not expect digital sales to surpass $80m this year, yet iTunes alone reaped $1m in revenues within a week of launching its Mac-based service in April and has now sold $14m worth of music. It launched a Windows version two weeks ago and generated $1m in three days.