Yesterday, Pandora updated their Android app bringing tablet support, but one thing Jeff Causey mentioned in his post was that the Chromecast button was present, but it didn’t work. Sometime between yesterday and today, the button became functional.
You don’t need to update the app again, but you might need to force close it to get the functionality working. If you never tried Pandora, you might want to give it a shot if you own a Chromecast, since it’s the only other option, other than Play Music, for your listening pleasure. Hit the break for download links.