Play.tm recently had Aion displayed to them by NCsoft and they are very impressed.
Luke Guttridge at play.tm finish his article by saying the following:
"As my demonstration concludes I'm struck by the lengths NCsoft are going to with Aion to create something which offers a genuine break to their own MMORPG cannon, and a strong rival to genre leaders such as Conan and of course WoW. Aion looks set to offer a diverse experience, which engages the player on multiple levels using a variety of techniques. Of course, much will depend on how well the multiple elements of this game function together, and whether the world hangs in a balanced manner, but the signs are good. Very good, in fact."
A correction to the article has been made by a NCsoft Community Representive over at AionSource.com, Ayase at NCsoft Europe has the following to say about it:
"This was made from the Press Event we held recently, but the lore is quite intricate and perhaps overwhelming to take in all at once, so I understand that a few thigns were mixed up by some of the journalists.
Super-short version:
Aion created the world. Five Dragon Lords overthrew his rule. 12 Empyrean Lords, created in the image of humans, were made by Aion to counter the Dragon Lords and bring back balance. These Empyrean Lords would eventually split up and become the Elyos and Asmodians."
Full preview can be seen here.