After how many years submissions are accepted for a new AES? Few months back I heard the news of attacks on AES and it is suggested that AES-128 bit is more secure than AES-256-bit.
For details read this: http://www.schneier.com/blog/archives/2009/07/another_new_aes.html
Bruce Schneier says we're safe...and I trust that.
I'm not seeing a "new" aes until this one is woefully broken
One more thing, to be clear AES 192 still takes longer to break that AES 128 or AES 256 per Schneier.
He goes on to say that there are related key attacks that really make AES-256 breaking almost feasible.