Virgin Pacific or whatever name they settle on are looking at different aircraft at the moment.
Rumors are either the 777/A340 or the 787.
They want to start flying in 2008, so that pretty much rules out the 787 for the short term.
Also the 777 may have ETOPS restrictions from say Syd-Sfo ??
The A340-600 is probably going to be it in my opinion
Also previously Virgin Blue, have mentioned that the experince will be "Nothing like that in offer currently" so expect heaps of premium economy and MAYBE business class. But probably IFE in each seat, maybe massages, nice bar area for ALL Passengers etc ?