http://dnd.wizards.com/articles/features/unearthed-arcana-eberron
Just the beta rules. right now. Mostly adds, 3 races, new wizard archetype, and the dragonmark feat. Though the dragonmark shouldn't be used in faerun unless theirs a major reason too (or we just don't care. its only an iconic ability of eberron.)
Everything else we can justify.
Also adds in action point rules but would need our GM to say we're using that rule.