A preview of the 10th EverQuest expansion, Depths of Darkhollow, was offered at the Sony Online Entertainment Fan Faire over the weekend. The highlights include many new zones (static and instanced), some high-end content, the ability to play as a monster, and "smart" items. While an official announcement is planned in the very near future, Loral of Casters Realm has posted a pretty good write-up of what was shown at the Fan Faire. You can read that article here.