It'l be a while if we get it down under though we always miss out on all the cool stuff. We did just get Keldeo last week so I shouldn't complain. Mine's sitting in my PC box with Victini and Genesect as we speak.
I usually just go in and get the mystery gift. Then again, I don't seem to go to one of those fabled horrible workers Gamestops. I like the staff at my local one, they're cool.
From the sounds of things, it works with all gen 5 games too. Looks like I'll be getting an trade-able one while I'm at it. I do enjoy when they do that, it means I can help people get one if they can't catch the event.
Turns Australia and New Zealand get Meloetta the same day as the states (says Bulbapedia) although only a few stores actually have it and none of them are near me. I can't see why they don't just put it over Wi-Fi.
I think they'll eventually release Meloetta over Wi-Fi, just not right now. The same thing happened with Keldeo - it was first released in GameStop/various corresponding store outlets, and then Wi-Fi several months later.
I guess the stores holding the promotions are the ones who will benifit from them. "Oh, while I'm here I can get that thing I've been meaning to get the past few weeks"
It would be nice if Melo came with a different attack (something like V-Create Rayquaza) or was holding something cool. Just to make the 2 hour drive to my nearest participating JB-Hifi seem worth the trouble.