Official Site: http://www.playonline.com/ff11us/adoulin/index.html
Andriasang Article: http://andriasang.com/con1mk/ffxi_adoulin_screens/
It's been five years since XI's last expansion Wings of the Goddess, and people thought XI to be all but finished, but a new full-fledged expansion has been announced!
Most exciting bit, Geomancer is one of the two new Jobs! I am also going to guess the second unrevealed job is in fact the Exorcist, or something similar. There are three NPCs in the game for the Halloween event from Adoulin, who are all exorcists, and the silhouette of the unrevealed job on the main page seems to have a ring-of-warding sort of thing around him. All speculation, of course.
The Andriasang article above has more information for anyone that is interested.