Gaddafi was ousted from power and killed. Most of his sons (heirs) are in captivity or dead. Right now, the interim government is still trying to find its place. There are still conflicts going on. Libya is a tribal country, and there are reports of cells of Gaddafi loyalists still fighting on. The situation there is still very fragile and hard to predict. The National Transition Council is still in the process of drafting election laws.
Former President Ben Ali was deposed and remains in self imposed exile. The Tunisians have just had their first elections, and have elected their first post revolution president (former dissident and centrist secularist Marzouki) and a constituent assembly where the majority of the seats went to the Islamist party Nahda. They are in the process of reforming the Tunisian constitution.
Even though president Mubrarak has stepped down and is undergoing corruption trials (along with several of members of his cabinet), the interim military government has yet to relinquish control, although they have relaxed the emergency laws that have been in place since 1958, though not fully lifted them.
The Egyptian people have just recently finished electing a new parliament, where again formerly banned Islamists have won the majority of the seats. There have been mixed results from them. On one hand, the new government has declared that it would not break the peace with Israel. On the other hand, there has been more and more cases of legal prosecution against anti-Islamic free speech. Egypt's situation remains very volatile.
The country seems to sinking deeper and deeper into a state of civil war. Although the Syrian regime has been ostracized by the international community and its fellow Arab nations, it still has an ally in Iran. Russia and China as well seem to be determined to veto any UN sanctioned actions against Assad's government.