It's been a while since I have found something new regarding Aion, but in Liv, Aion's new US Community Manager, has in a letter to Aion's fans said that Aion is planned to be released the fall of 2009. I am a bit disappointed, as I had hoped it'd be released this summer, but the fall is better than 2010.

I also recently found a play guide video to Aion, and I recommend watching it: