The part I love most about this Hammerfast is that the orcs and the dwarves obviously still hate each other, and thus will be feuding, but the priests of Moradin and Gruumsh are sacrosanct. Thus, both sides will freely use minions, sponsored gangs, and adventurers to do kill off each other's associates while never really being able to achieve absolute victory.
Since it is illegal to even do that, you probably end up with a cold war under the surface with lots of spies and assassins, which the victory is determined by catching a priest in the act of conspiracy, and thus leading to his death.
Throw in sacrosanct or hidden tombs, and this is a great, great, town to do a thieves' guild campaign in. I was going to get this based on having a convenient guidebook for a dwarf stronghold, but this actually makes me want to run a adventures in it.
Add in the Orcus stuff from the Keep on the Shadowfell, the Temple of Yellow Skulls, and the Demon Queen's Enclave... and it seems the power of undeath is strong in the Nentir Vale.