In the past BV hasn't released the details of their interstate rides until a bit later in the year. I missed the end of the WA ride, but I presume that they announced that the next ride would be in Tassie (I heard a rumour that it was the East Coast). On past experience I would guess that they will release more details in a few months and there probably won't be much useful information on their website regarding the ride until then.
But I could be wrong!
I did the East Coast 3 years ago and it was awesome. Obviously less hilly than the West last year, but a very nice ride indeed. Highly recommended!