Yep - row 12 on the 700's. I did a day trip to Brisbane yesterday and booked 15D both ways as I thought that was the exit row. Should have known it couldn't be as I don't think they allow online booking of exit rows (or maybe I was just too slow?).
So how do you know which aircraft type you are going to be on?
No online checkin for exit rows, they are reserved for people paying extra for Blue Zone who have to check in at the airport. Nice to see DJ seem to have their priority queue sorted now... we managed to check in very quickly last night.