I downloaded the latest Mastodon without the last track. I did not like it at all and hearing the last song is not going to change that. The guy who does the aggressive vocals only appears on one song. It lacks the cool heavy riffs that made me like Mastodon, they sound more progrock-ish than before.
I haven't liked a single 2009 release so far but it's a promising year. The Mono album does nothing for me, same old post-rock clichés. Im looking forward to Agalloch (I guess it will be released this year), Katatonia (hopefully), Dream Theater, Abigail's Ghost, Porcupine Tree, My Dying Bride and Anathema, I probably forgot some.