It is increasingly clear that the Arab nations with lots of oil to export also have better means to crush their uprisings than the leaders in such non-oil exporters as Tunisia and Egypt. Thus, King Abdullah of Saudi Arabia has sent troops in to Bahrain, allowing the Sunni monarch there to use his police to move harshly against the largely Shi'i dissidents, even though the Shi'a are about 2/3 of the local population (there is a substantial population of expat workers, mostly Hindu Indians). The US has a naval base there, although reportedly the US administration has been unhappy about this move by the Saudis. But the Saudis apparently do not want any infection into their Shi'a, who, only 12% of the Saudi population, are concentrated in the oil-producing Eastern Province (and are heavily active in the oil industry itself).
In Libya we are reminded that the sine qua non of a successful revolutionary movement is when the lower levels of the military turn against their commanders and the national leadership to side with the rebels. That has not happened there subtantially for two reasons. The more widely reported one has been Qaddafi's ability to hire mercenaries given his oil funds. The other is that he enjoys the support of some of Libya's tribes, including the nation's largest one. This means that the civil war component probably does outweigh the revolutionary component, and despite the Arab League voting for a free fly zone (with Algeria and Syria abstaining), it looks that Qaddafi's troops are successfully heading towards the rebel capital of Benghazi. This could be all over soon, and it was never very likely that a free fly zone would have done anything anyway, given that Qaddafi has managed to retain the loyalty of most of the military on the ground (unfortunately in my opinion).
BTW, Syria has experienced its first demonstration, although only a small and brief one. However, given how repressive the regime is and how long it has been in power, plus the fact that the rulers there largely belong to a religious minority that is only about 10% of the population, the Shi'i Alawites (part of the reason they are friendly with Iran), it is a bit surprising there have been none earlier (and they are not oil exporters either).
Unsurprisingly, good reporting on both of these events can be found at http://www.juancole.com and http://xrdarabia.org .