Music exchanging application?

[Samelson03]

I'm looking for an application similar to Mojo and Home Sharing feature in iTunes. I used Mojo for years up until today. It's a really long story that I don't want to get into. Let's just say, I got incredibly frustrated with the application and i'm finished using it. Me and my friend like exchanging music once in awhile so I thought i'd ask around for something new.