1) Don't make it autoplay - "Press play to get started" is much, much, much better
2) Ask me for artists I like and make recommendations
3) Ask me for friends that are also on hiphopgoblin and let me see (and play!) their likes/dislikes
4) Make the player pop out and keep the music playing when I open top 50 somehow (new window?)
5) Can I get some visual feedback when I thumbs up something?
Absolutely love the low barrier to entry!