I'm not sure if this is "old hat", but I discovered this the other day. For those of you who use Pandora, you can long click a song and automatically send it to pandora to create a station. You can also long click an album or artist and it will send the artist to Pandora. I find this useful when I don't know what to listen to and I put my music on shuffle. When I find something that suits my mood I just send it over to Pandora.