According to Ned O'Keefe, a crazy Cork politician, Ireland could be next.
But seriously, well, aside from the successful oustings in Tunisia and Egypt, there have been other governmental changes for the better in countries like Jordan. The whole of the region is affected in some way, and there's no telling when this will die down.
I found the colour-coded map from Wikipedia quite interetsing. It also shows the vast area covered by MENA states, which count for something like 6% of the world population.
One thing that is also noticable is the unprecented nature of the ripples. Waves of uprising have been feared throughout history, from the French Revolution to Communism, and have never quite lived up to the expected hype. This wave of protests is unprecedented, and it's notable that they are also democratic. They are not about killing kings and tzars, or changing the shape of society, they are about simple freedom and a fair consitution. The numbers in Egypt were comparable to Russia in 1917 or Iran in 1979, but peaceful and non-violent.
I think this is a good thing. This will change the face of the Islamic world forever (for better or worse), but I think that however the dust settles, a powerful message has been sent. A very meaningul phrase that was spoken on Al Jazeera English was "Democracy is in the eye of the beholder." I heard that and felt truer words were never spoken. We in Europe or America may find that the end results of the changes there are not to our liking, but democracy is about self-determination, letting the people of a nation choose who they wish to lead them. It is not about who the leaders of other countries think should be in charge.