You all should read up on the virus itself:
http://en.wikipedia.org/wiki/Ebola_virus_disease
Yes it is Wikipedia but it's pretty accurate.
Bottom line is that the virus' mortality rate is what tends to keep it in check. You only become infectious when you start showing symptoms and the only method of transmission is through direct contact with bodily fluids. This is not like Influenza where a carrier can be infectious without outward symptoms. That is what leads to epidemics spreading uncontrolled. You couple this with the reputation that the Ebola virus has and any time it flares up they clamp a very tight lid on it. All you have to do sit and quarantine folks for a couple weeks and those infected will either recover or die off. Self regulating.
What is scary is if this virus should mutate to alter it's transmission vector or reduce it's initial outward symptoms. This could lead to a very deadly problem. Fortunately that does not appear to be the case.