MP3 Market Approaching Critical Mass

An anonymous reader writes "Led by the Apple iPod, Jupiter Research says that sales of DAPs are reaching a point where it will ignite an industry of support products and services. According to Jupiter analyst David Card 'Historically, any new device or medium that reaches a U.S. household penetration of 15 percent to 20 percent creates a critical mass of customers for other products and services.' The iPod already has a slew of peripherals out there and this is particularly good news for the paid download services like iTunes, especially with Apple announcing Wednesday they sold another 5.3 million iPods last quarter."