According to WHO, number of new cases per week in Guinea and Conakry peaked in September and have been approximately stable since.
In Liberia they peaked at about 500 in mid-September and are now down below 100.
In Sierra Leone they peaked at around 600 about three weeks ago, and MAY be starting a decline similar to that in Liberia. Too early to really see whether that is the trend or not.
In any case, 600 new cases in a week is infinitely better than the 10,000 predicted a couple months ago, or the hundred thousand some predicted for the end of the year.
Could Ebola still explode? Of course it could. But that it hasn't (yet) is very encouraging.
I wonder if this is a seasonal thing, tied to temperature.