The French Political Blogosphere: This appears to be all the sites. Their affiliation is color-coded. I was very amused to see the Left is pink. The Far Right is brown.
Blogosphere of Militants and Their Sympathizers: Blogs and sites connected to those with rather extreme views on the Left, Far Left and the Greens.
The Party Blogosphere: Over 1000 sites connected to the official parties and those who support them. I see that the folks from the Lutte Ouvrière are there.
A really amazing diversity of views, movements, parties. Have a look. There are links at the bottom of each map which will take you to an analysis of each map. Not a bad way to become more familiar with the French political landscape.