If Prime Minister George Papandreou survives tonight's confidence vote, he will push for the austerity measures needed to secure further financial aid from EU and IMF to avoid a default.
Businessman Pedro Passos Coelho will lead a coalition government after voters handed the center-right a convincing victory. Portugal's bailout and austerity measures were central issues.
US Secretary of State Hillary Clinton will attend the Zurich signing that moves the neighbors toward opening their border. They have long been at odds over the issue of the Armenian genocide.
Britain's Gordon Brown could fall, while Dutch populist Geert Wilders's anti-Islam stand finds new appeal.
A vote Sunday could end Switzerland's brief experiment with open borders.
The Nabucco pipeline, scheduled to start construction in 2010, would ship gas from the Caspian region and the Middle East.
Italian Prime Minister Silvio Berlusconi (r.) and his foreign minister, Franco Frattini, spoke to the media Wednesday at an EU environmental conference in Brussels.