Well, as it happens I just moved across 126,240 VA points to purchase 93,540 worth of J Saver SIN-SYD on the 777-300ER, Row 11 mini-cabin seats selected too. That's two J seats at 55K points each discounted by 15%. I did experience a bit of a problem paying for the taxes though. A 'Verified By Visa' screen pop up after I entered in my card and since I didn't have the password, I lost the booking and had to start again, using Amex this time to avoid the silly Visa card issue. I then went on to make a HKT-SIN Silk Air booking using the Amex and it popped up with it's own Verification Required issue. The flight confirmed, but is now showing in My Bookings so I really don't know where that is at.
This is all for what should be a lovely little Christmas New Year trip for my wife and I: SYD-HKT Jetstar 'J'; HKT-SIN Y and then SIN-SYD J.