From the pandora blog:

Starting tonight each time you hear a song you'll be able to click on the song title (in the song "slide," above the album art) which will take you to a page devoted to just that song. You'll then be able to listen to a sample of the song, see what album it's from (lots of you have asked specifically for that) and send the URL on to your friends that might like the song. Ok, so it's a very small thing, but we hope you like it. More to come. Stay tuned!

As a software designer, I can appreciate the little things. They make a big difference.