I've added buttons to all the artist and album pages that make it easy to post to Twitter and Facebook that you're enjoying an album at Magnatune.
Look for these two buttons on the left column:
when you click on the twitter link, a tweet is pre-filled out that you're "Listening to XYZ -" and the URL for others to listen to it. You can change (of course) the tweet to say whatever you like:
the same is true for Facebook users, though here Facebook pulls the album art from the page, and lets you add your thoughts:
People have started to use this feature, even before I blogged it!