I think, the Permaweb comes pretty close. You can annotate any upload (arbitrary data, files, or collections of files) with tags and since the data is permanen

I think, the Permaweb comes pretty close. You can annotate any upload (arbitrary data, files, or collections of files) with tags and since the data is permanent, your links don't break. Publication is possible too, and with the Universal Data License, copyright holders can define the terms for their part of the publication right at upload time.