Direction needed Dynamic Music Site

[bnations]

I am in the process of designing a website but need someone to point me in the right direction. The site will be for musicians that are not signed to a record label. I want the users to be able to sign in and upload about 5 MB worth of audio per account, then have that song appear in the main site. So it will be like a showcase of bands demos.
I have a hosted linux webserver, block of email addresses and a MYsql Database.
What do i need to get this together, php code, etc.?

Thanks