Available now (at least here in Canada). I've already bought it. However, there's a problem DLing, as the DL through the browser gives a 404 error, and the GOG DLer throws an error as well.
Apparently we were the only ones able to buy during that brief moment when it was available, comrade. Now all those capitalist pigs will pay for their crimes. X-D
I was shocked to see that it was already available, I tend to forget at what time they consider it to be the 10th.