Some people in the US have posted that they have received shipping emails from Hasbro, and two posts I read said that FedEx listed their delivery as tomorrow (today) so it could be sooner than we realize.
Also if history is anything to go by, for me, I expect to get my HISS and then a day or two later I'll get the email from Hasbro telling me my HISS is shipping. That is what happened with my last couple of Haslabs. I am still hopeful that most of us will get it before the end of the year.