I have no idea why people are so pissed about this stuff. Here you go, free of charge:
Tieflings. Two words: resist fire. A roaming band of horned barbarians with sandpaper skin, walking naked and barefoot across the burning sands, sharpened teeth ideal for cutting through the only tough meat they can find: yours. The lone hunting sharks to the halfling's piranha feeding frenzy.
Dragonborn. Pathetic remnants of a mighty lizard race. Trying so hard to delude themselves of their relevance when their time has clearly come, the only thing that keeps them from being snuffed out altogether is their cognitive dissonance; when near defeat, their broken pride turns to a suicidal bloodlust that is legendary.
Deva. When one goes mad in Athas, there is so far to fall. Babbling nonsense to gods who cannot hear, telling tales of lives that have never been lived, eyes wide with sights that no one can see. If by pity or fear they are not killed, they can be easily identified by the mud and pigments they smear their faces and bodies with, claiming them to be "divine markings".
Divine characters. With no clouds for gods to hide behind, in the sky there is only the harsh, unrelenting sun. When when you fight against one blessed by the elemental spirits, nothing can shade you from the searing heat and blinding light. Whether one channels the rivers of silt, the blistering heat, the shifting sands, or the bone-dry winds, it must be remembered that the desert sun looks down over all these things, and over you.
Seriously, guys, even if my attempts at alternate flavor are off-base, 4e fits right in.