The unification of Syrian opposition groups is almost certain to improve coordination with the international community, whose backing could add crucial momentum to the uprising.
UN Secretary-General Ban expressed frustration about the lack of unity among UN members on how best to deal with Syria's brutal crackdown on a pro-democracy uprising.
The US is expected to call for Bashar al-Assad to step down and UN Secretary-General Ban Ki-Moon will push for International Criminal Court action against the Syrian president.
Weekend violence in Homs reportedly stemmed from tensions between Sunnis and Alawites. Some activists say the government is intentionally stirring up sectarian fighting.
But Syria's opposition in exile met in Istanbul anyway, electing what it called a National Salvation Council this weekend.
Syrian President Bashar al-Assad gave his first speech in two months today, offering elections and reforms this summer in an apparent bid to secure the patience of Syria's silent majority.
The Syrian regime's claims that 120 soldiers and security personnel were killed in Jisr al-Shughur over the weekend have intensified the debate over who is behind the uptick in armed resistance.
The 'Great Friday' protests in Syria, the largest so far, also saw President Assad's forces commit mass murder. Western leaders like Obama can no longer sit on the fence, hoping Assad is a reformer.