You could create a music database wiki with SQL similar to thetvdb.com that would be searchable using PHP and contain all the artists, albums, track, and album cover art, then when a person clicks on an album you could have the code on your website search a site like btjunkie.org and stream the healthiest torrent (top of the search results list).

Let me know if you want to partner on this, I was working on this solution when I found you. I already have built the database (but no cover art) and I already wrote the code to parse the search results from btjunkie.org and select a healthy torrent. The only part I'm missing is the ability to stream the music as it downloads, which is when I found this site.