It doesn't look like they are going to be doing any additional supplements to DLoM. I think they have the Corrum books, but I can't remember whether they are for the D20 system or for the D100 system. MoreDew has them, I think.
Last I checked DLoM was not the biggest seller, which is upsetting because I think that is why they nixed the Lords of Law and Chaos Supplement book they were going to do for it.
It think that the game is pretty good for the most part. There are a few things that I dislike, mostly to do with the demon summoning and binding rules. Because there is no such thing as POW in the D20 rules, to bind a demon you have to sacrifice XP (which I don't mind) and an ability point (which I do mind). This is entirely contrary to the typical D20 rules, and, as normal magic weapons are a not common in the DLoM world, an injustice to the players who can't use the fun little towys. In addition, the Invoke and Compel Spell is a Sor/Wiz spell only; clerics can't cast it, which I find entirely contrary to the nature of the world. This is odd as The Theocrat of Pan Tang, a cross class Cleric Fighter, if I remember, has about 5 bound demons.
Another problem that I have is that all of the NPC have astronomically high attributes, that are entirely unattainable by the normal creation rules. While I understand that the PC's are not the "heros," who appear in the books, it makes it a little daunting for the players when they see the numbers of the NPCs and compare them to their characters.
Other than that I don't have any real complaints. Mostly just mechanics. The world is great. I have about 6 different campaign ideas that would be a blast for the guys to pursue. We'll just see where the Lords of Chaos take our players.
Laugh like Balo.
Whisper like Pyray.
Slice with your weapons.
Let the Blood Spray.
Praise Chaos!