I think this is the fourth track that has been leaked for promo purposes now! You can stream or download the mp3 of Entertaining Thoughts at http://www.last.fm/music/Over+the+Rhine .
...I always love free tasters, but four for one album is a bit ambitious ("If A Song Could Be President" and "Trouble" went up on some other site a while ago, and there was a review on some blog that gave away "Who Am I Kidding But Me?"). It never hurts to let people try out the band for free, though!