Alien54 writes "Xingtone's desktop software allows you to create mobile phone ringtones using digital audio files on your computer. As seen here, The software evokes the same ``oh wow, oh no'' reaction from the labels that greeted the original Napster. The fear is that people will make 30 second long ringtones out of popular songs, thus compounding the file-sharing problem while robbing the music industry of a new source of revenue. Many users find the technology quite cool. IANAL, but current copyright guidelines seem to permit fair use of "Up to 10% of a body of sound recording, but no more than 30 seconds". All of which should make for an interesting legal debate. I can hear the gnashing of teeth already."