There's 20-odd countries it's in.....
There's no way anyone could know what the stock levels are like in every country.
Here in Australia it's still readily available...

Although it has been dropped by some telcos, & I imagine the rest will drop it in the coming wks/mths.
Especially since Nokia's started it's Lumia program here now, & is doing it's best to make them visible.
(not actually here yet, but is announced, & has been pushed quite hard for some time already)

But that doesn't mean the N9 won't continue to be available with retailers & specialist importers.
This was much the same situation for the N900 for a loooong time.
It will reduce the uptake of course, as more people buy phones on contract here than outright.
That's not the same for every country though.