Much has already been made of the tiefling/World of Warcraft connection. Wowever, what they immediately reminded me of was the Tarterans from Talislanta's Midnight Realm, a race of the fiend-blooded ruled by an aristocracy of necromancers.
Eldadrin are high elves that teleport. Their archetype hearkens back to Corum's folk, but also the more fey and strange elves, after the fashion of Poul Anderon and Patricia McKillip. The teleporting thing seems to come from "fey=teleport."
Dragonborn may or may not have drawn inspiration fro GURPS Fantasy's lizardfolk, a proud, martial folk who once ruled a desert empire brought to its knees by human armies and now often work as mercenaries. In appearance, they look a lot like Dragonlance's draconians, to me.