AMIP is a program that gets the currently playing song title from your music player and broadcasts it to your email client and MSN messenger among others. I now use it for my email signatures and in MSN Messenger7 where it does a very good job.
It has many builds and you need to pick the one for the player you currently use. In my case foobar2000, which is quite possibly the best player available. :-)
I got the latest BETA release from here: http://amip.tools-for.net/config/. The lastest stable release among other things is available here: http://amip.tools-for.net/
You’ll also need to grab the latest Configurator to make all the setup easy.