It's fairly new and a lot of fun. You can upload any song on your computer into a playlist, name it, describe it, tag it, and publish it. A great site to find new music at and you can also follow/be followed. For any music-explorers like myself, I highly suggesting checking it out!
To start off, here is my profile.
http://8tracks.com/cosmocongdonAnd yes.. that is me in the picture.