At VanaFest 2012, the development team revaled a new expansion that will be released sometime next year for Final Fantasy XI Online!
The expansion will take players to an area called Audolin in the "near west", across the sea from Tavnazia, and so far, the addition of a Geomancer job is confirmed.
The name of the expansion is apparently "Seekers of Audolin", but the English title might not be exactly the same.
Another new job will be announced tomorrow. In addition to new jobs, new areas, stories, and monsters plan to be released.
Check out the official site here.