New news: Some guy somewhere spoke to Matt after the Winnepeg? show last night and found out the song is heavy. DES is the name of the technician who was meant to put an effect on the song, like when Eternallly Missed was on a setlist and it was (DDDD).
So, there are some messages floating around the official muse forums regarding a new song (DES) played in the US last night (Salt Lake City). (told you so!!)
Anyway, apparently the song is called "Dead End Street" - I have no idea how reliable this is, so dont take my word for it.
Anyway, here is the topic :)