Not technical but this question made me too curious: who do you expect to upload music? Artists with reputation or anyone? Or, the point is to offer an url shortener service for MP3 songs?
We expect anyone who makes music to upload. We have a few famous artists like The Streets (http://bln.kr/-skinnermike), some internet famous folks like Levar Thomas (http://bln.kr/-LeVarThomas), and plenty of people just trying to make it. We also have hobbyists who just want to share music with friends.