UPDATED: Current Track to Twitter v2.0
Not necessarily to commemorate the opening of Chirp: Current Track to Twitter v2.0 will tweet information about the currently playing track to your Twitter account, either automatically every time a new track starts or manually with a click of its Dock icon. This latest version is pretty much just a maintenance update since it was last updated in 2007. (See the screenshot I've included on the entry page. "Updating live every two minutes" and "What you and your friends are doing" sure bring back memories.)