Hey,
since I found this Forum I really enjoyed the site Pony.fm aswell. This is why I thought About some Features that could really improove the Website.
After you enter something in the searchbar make the things like "Matching users" or "Matching albums" etc. clickable Links that will lead you to all Search results of that category. Because I noticed that if you search for a more popular but older song (Hooves up high for example) that a Million remixes Show up but not the acual song itself. That feature would fix that Problem.
Give me the option to configure who sees my Favorites and who not. Because some people love more privacy
Not necessery but maybe quite nice to keep the Database updated: For the songs of the "archived artist profile" make a "Suggestion" button available where people can submit Thumbnails and Descriptions to make the song look nicer. That could also be done for the songs of "Various Artists" where an Artist could be suggested. After the suggestion is submitted, a Moderater could check if everything is in order and then just update the whole song by just the click of one button. That would make the Moderation of Songs way easier and it would be a collective effort. Maybe even reward users that have many approved Suggestions by giving them something cosmetic on thier Profile or even allowing them to approve suggestions themselves after a little Helper Application.
I hope that these are some pretty nice suggestions. I know all of this would require some huge backend work. But it would definetly improove the Website in my opinion.