Ugh, there was a site that allowed you to distribute digital files of any kind for Bitcoin but I've completely blanked and forgotten what the name was. If I remember it, I'll let you know. :/
let me know if you remember!
im quite "shocked" that something big in this space hasnt been done already, or at least isnt easy to find.
i heard there is a bitshares derivative (peertracks or something), but they are not finished yet.