Tonight I headed to Ash Island to help with a rescue, and discovered ether flowing just south of the Dark Temple. There were no ethereal creatures in sight, but the undine found there were willing to attack some of the flow--this proved useful when exiles became trapped by the flow.
This is the first time I've seen ether flowing without any sign of an incursion or other unusual ethereal activity. I wonder if it has something to do with the large numbers of Greater Deaths reported on the ethereal plane recently?