I live in South Africa, and I will restrict my comment to SA. I think to make sweeping statements about or on behalf of a whole continent can at times be a rather dangerous affair.
Here in SA the Dharma is coming along nicely, in that slow but sure way the Dharma seems to have. I have been a practicing Buddhist now for eight years, and I can see some big changes just in that time alone.
Karma Kagyu has two large centres here, one in Johannesburg and one in Cape Town, and a large, well-run specialized retreat centre in one of the more isolated, rural areas. They also have a strong grass-roots presence in several other cities. The Gelukpas are coming along nicely, and their centre in Johannesburg is starting to bring out some really big teachers.
Cape Town has a very strong Theravadin centre, and a Shambala centre that seems to be growing strongly. There are even a few Dzogchen practitioners around, even though they have not formed a real group yet. NKT seems to be doing well, there is a very strong Zen Centre (run by Heila and Rodney Downey) in Cape Town and Rondebosch, and the Buddhist community (mostly Chinese / Taiwanese) at Nan Hua is a large, strong community. There are several smaller retreat centres all over the country.
In my city (Port Elizabeth and neighboring Grahamstown) we have recently started a Kagyu group that is growing nicely.
Teachers of senior stature seems to still be a rather difficult matter, although both Kagyu and Gelug seems to be putting in more effort on this important aspect.
My guess is also that as we see classical theism coming under increasing pressure we will see a small rise in Buddhist practitioners, or at least those who are interested in that.
I am confident that here in SA the Dharma has set down its roots, and the precious plant is growing. Slowly. But surely.