Ever been to Outshouts? It’s a relatively new site that lets you send songs to people, complete with a recorded introduction by you; you can send the song and the message either via email or via cell phone. You can also turn the recorded message plus the song into a widget, as I’ve done here. All for no charge.
I’m intrigued by this, and am going to experiment with using Outshouts here on the blog, and perhaps on the main site too. You can listen to this one, share it if you’d like, and of course you can go to Outshouts, sign up, and start using the service yourself.