First of all i would like to say great job! I've been using Music Quest for a while and this is a really good update.
The only thing that bothers me is that i usually use the feeling-lucky list to discover new bands. I would love to be able to listen to the songs before i add them to my playlist instead of adding countless songs to my playlist and delete the ones i dislike.
 "MusicQuest 2"){kind=icon}
Good point. I added this functionality, though it is only accessible if you have a mouse with a scroll wheel.