More details and actual release sometime soon... I hope. There's still some things to iron out and god knows what. And that zombieman isn't part of the thing but the mapset, just in case.
Maps:
http://forum.zdoom.org/viewtopic.php?... - Topic, currently outdated, but will be updated over time, so better check it out later in time.
http://static.best-ever.org/wads/ultd... - The current one used in the trailer. Surely will get outdated/not working onward.
Muzak:
Queen - Don't stop me now
The Refreshments - King of the Hill Theme: "Yahoos and Triangles"