Damn it! What a punch in the gut. Seriously. If this isn't a sucker punch, we don't know what is. Earlier this afternoon, one of Denver's more visceral live acts, American Relay -- the subject of this week's Critic's Choice -- announced its split. The soul-drenched, positively combustible duo comprised of Nick Sullivan and Alex Hebert will be playing its final show in the Mile High City this Saturday night at 3 Kings Tavern and releasing the followup to its excellent 2007 debut, Corn & Oil.