I'm wondering if anyone could use some rules incorporating some unique rules from Eberron. Mainly the Races of Eberron (Warforged, Changelings, Shifters, Kalashtar) and the Artificer class (which would probably be an unblooded substitute for humans other than the magician). Here are some ideas:

* Warforged could have been made for the Battle at Mount Deismaar for both sides. However, the Creation Forges were located on Aduria. Surviving Warforged might have a bloodline score, since they are living constructs.

* Changelings are the offspring of Dopplegangers and humans, just like it says. They would be found mostly in the cities.

* Shifters are the offspring of Lycanthropes and humans, probably an experiment in the Beastmen. Most shifters joined the forces of Light at the Battle of Mount Deismaar.

* Kalashtar are the strangest. They carry the spirits of the Quori within them; giving them psychic (psionic) powers. Since Birthright already has a lot going on with Blood Abilities, using the Kalashtar would mean that the non-psionic version has to be used. However, they could still be used. The Quori could be Azrai's servants or whole different faction entirely.

* Inspired. Which brings us to the Inspired. The Inspired are agents of Dal Quor in Eberron. Having Inspired would be . . . a whole other dimension. But it could be doable.