Essentially it is a godless army. So now Daemons of ANY kind (excluding a Daemon Prince, for whatever reason that is), no Cult Troops of ANY kind (including Cult Terminators). Obliterators are allowed.
I have the entire Index Astartes for them, but I don't know what WD # it was in. I'm also not sure of the GW policies on posting this kind of information...so to play it safe, e-mail me if you want the information. SparqMan@aol.com