Just a quick reaction: the Socialists have done very well, and the Left, if you add the votes of the PS, Europe Ecologie-Les Verts, and the Front de Gauche, and other parties, has done very well indeed, with a score around 50%. But the turnout was abysmally low, with 63.6% abstentions, the worst in the history of the Fifth Republic. The various rights, which include UMP, renegades from the UMP, and divers droite, are at around 30. And the FN is running 15-17, which is two points ahead of where it was in 2004. A good showing, but not overwhelming, except that the FN will be in the running in numerous constituencies for the second round, and there will be a united left front to block the party of Marine Le Pen.
UPDATE: The abstention rate has been revised to about 55%. The PS got 25 and divers gauche 4.8, which shows little progress in the core of the left vote. EELV had 8.3. The Front de Gauche approx. 9. The UMP got 16, "crypto-UMP" another 6, divers droite 11. The FN has 15.