Could you provide some feedback on a friend's social music service?

Some friends of mine are working on a social music site after the style of Reddit. In fact they're a licensed affiliate of Reddit. The concept is pretty simple: Musicians upload their music (music they hold the rights to) and listeners vote on the songs as they're playing or as they find them in /r/radioreddit or the charts and discover sections of Radio Reddit. As songs recieve votes they are promoted on the stream by having a higher probability of being included in the live stream playlists as well as making it on to the charts. As I understand it, the voting actually works via Reddit. After a song is uploaded, listeners can submit the song to the /r/radioreddit subreddit with the song information where it will then accumulate votes. Songs are then included in different genre playlists based on their popularity (the algorithm is public in their faq http://radioreddit.com/faq). The service is called radio reddit. See: http://radioreddit.com/ I think the admins are interested in feedback related to the usability of the site itself as well as the service in general. Feedback would be greatly appreciated!