Muxtapes. They’re online Mixtapes. Upload your favourite mp3s, arrange them in an order of your choose and share them with the world on Muxtape where the songs will play on a single webpage with pretty where the songs play one after the other.
It also works on the iPhone. And you can save em on your dock on MacOS. And you can make coverflow versions too.
Do you use Muxtape, have you favourites?
Also see Cassette from my Ex, another interesting project.