I've just sent a few queries off to BBTS of my own. But people here might already know the answers:

*Will GST be charged on each individual item as we purchase them, or will it be charged on the overall cost of combined shipments (such as from HLJ and BBTS)?
*Will the GST be charged on shipping costs (if shipping cost $60 before will it now cost $66)?
*If you have your items shipped to a friend in the US, then they send it to you as a 'gift', can the government do anything about that?
*Is the GST going to cover the overall value of shipments, or is it going to be something like a $7 charge per package (no matter how many items are in the package)?

I've checked the ATO site and taken soundings online and can't find a clear answer anywhere