P2P today means storing music and other files on your PC where you control it. That becomes e disadvantage when you have multiple computers and devices or you're away from your PC. This is where web services come in that enable you to store your music on a web server and provide instant access to it from any PC with Internet access.

MP3tunes continues to push forward with its server-based music offerings. The Oboe music locker has grown with Sideload, a directory that aggregates Obie user Oboe listings. It's just one click to add any song on Sideload.com or an Internet web site to a user's Oboe locker. MP3tunes main source of revenues is music backup and ubiquious availability through the premium Oboe Locker

More on Premium Oboe Locker from the site:

The premium Oboe Locker is $39.95 per year and gives you unlimited online storage to back-up your entire personal music collection, your playlists and all the tracks you sideload. You can sync your music collection in your Oboe Locker with each of your computers, portable players and devices. The MP3tunes Oboe Software Suite is free and includes Oboe Sync, Oboe for iTunes, Oboe for Firefox and Oboe for Internet Explorer. And like the free Oboe Locker, you can sideload free tracks you find on the net into your Locker and play your music collection inside iTunes or anywhere you have an Internet connection.