@Kasz. The international community ended up having almost no influence on Egypt or Tunisia, why should they here?
Bahrain - Yes. Because of the brutal but unsuccesful crackdown the protestors are super pissed off and have the momentum, the monarchy is likely to be toppled or made ceremonial.
Libya - Maybe. If the protests spread in a big way to Tripoli then the answer becomes yes. Currently as the protests aren't in the capital it's unlikely that they can topple Gadaffi.
Yemen - Maybe. It's a wait and see for how big this is going to get.
Jordan - Had the perfect response to the unrest. Also they weren't treating people so bad as the others and so the protestors weren't nearly as pissed.
There are a few things every revolution relies on. One is the other revolutions, the more dictators that fall the less chance the other ones have. Hosni was a big blow for all of the others. Another thing is the army, while the senior officers in each army are well entrenched in the regime all it takes is for the junior officers to say 'Sod this, we're not shooting civilians' and the protestors win.