Most have likely already seen this. But for the few who don't visit other forums ever, here you go:
http://forum.square-enix.com/ffxiv/threa...post117475
This letter states that the large 1.18 patch is coming in June, though a 1.17b -may- be given to us this month if it's feasible. Rank 30 and rank 50 dungeons are coming, along with new quest hubs and battle changes.