I see in the blog that it's supposed to do RSS (I had a whole post typed up about how they should before I noticed) but I have a rather dumb idea that someone might like out there: a tape could be able to be an RSS subscriber as well; that is, have the twelve newest songs of a podcast cached and available on this website.

Also, though I don't know how (can you access ID3 information client-side? do hashing/audio fingerprinting?), you might be able to identify the file before it's fully uploaded, and just link in someone else's copy if it's already been uploaded.