Egypt is top of my list, and some other North African countries. Running out of such oil as they ever had, not self-sufficient in food, and vulnerable to a collapse in the tourist trade. Also an 'ideological' rallying point for the disaffected (I don't think the ideology matters as much as you think, it just has to be a coherent-sounding alternative to the status quo - any alternative). Other places on Revolution Watch I would say Haiti is near the top of the list (for a change), Guinea... Places where things have calmed down but could get spicy again in the medium term include El Salvador, Malaysia. Umm. Uzbekistan.