For others, it will be Preston Garvey talking about yet another settlement that needs help, followed by a very timely "god dammit!" which I've said a lot, too. "Wasteland Cocktail" is the work of Bit Juice, and I suppose some of this could contain spoilers, as there is dialogue from the main character through some of the key scenes of the core storyline.
Source: Yahoo Music
Link: See and hear a music video made from the sights and sounds of Fallout 4