Give it time; on Dwilight at least it seems that the event is starting in the north (if Qadan's OOC in the SA channel is indicative), so if you aren't in Morek or Niselur (possibly Astrum) then you probably won't have heard anything even though it's officially started.
That or it's not happening on Dwilight but the last message I got seemed to indicate we'd be getting "breeding grounds" like happen on Beluaterra during an invasion.
