The NDA has been lifted on KoS, and the Achievements (don't call them AA's) system that many players are more interested in than any other part of the expansion has been explained and detailed. You can start with this thread from the main board and then go to individual class boards for the specifics.
http://eqiiforums.station.sony.com/eq2/board/message?board.id=kingdomofsky&message.id=6113
I for one am thrilled to death - almost all Templar Achievements give us more DPS, and they aren't set up to affect core class skills, other than indirectly, e.g. shorter casting and refresh times.
Edited, Fri Feb 10 12:34:34 2006 by Lydiaele