Ring Tones the killer app!?!?!?

Unbelievable statistics reported in the NY Times, via thewirelessweblog about the worldwide sale of ringtones last year totalling US$4 Billion. Now that’s a killer app in anyone’s books…..

The Motorola A1000 that I own has the ability to turn any sound file into a ringtone. If this functionailty becomes main stream, will it have any impact.