Yip - we have a shockingly low amount of WP7's here in SA. And until nokia actually decides to push phones here that is not going to change. Although, try looking around the interwebs - more and more people are starting to like the platform which is good.
Part of the problem is that WP7 is in a catch 22 right now regarding the amount of apps available.
A lot of consumers will compare it to the other 2 that are far ahead, and decide to go with iPhone or Android.
Developers will look at the low number of users, and the low consumer interest in WP7 and either not bother porting their app, or porting it later.
And I still haven't seen any "killer app" that isn't available anywhere else.
That said, I don't think what happens in SA will really matter to MS or Nokia. This is a country of followers, not leaders. They will be late to the party, after the world has decided whether or not it wants WP7. Right now they are all Blackberry addicts - years after Blackberry became popular everywhere else.
They're slowly catching on to Android/iPhone now.
I expect those two to dominate once everyone gets over Blackberry here,
with possibly WP7 joining in later if the rest of the world gets interested in it first.