I saw the poll yesterday, and while I don't remember the exact question, it was something like "who would you vote for in this line up", with the most likely 10 candidates - i.e. one per party:

• Laguiller (Lutte Ouvrière - loony left)
  
• Besancenot (Ligue Communiste Révolutionnaire - trots)
  
• Buffet (Parti Communiste)
  
• Voynet (Greens) - she has not been chosen yet by her party
  
• Royal
  
• Bayou (center right)
  
• Villepin
  
• Sarkozy
  
• de Villiers (sovereignist right)
  
• Le Pen