Hey jking, as a french dude maybe I can help you.
I'm near Lyon, which is quite a long way from Paris, so I can't give you any pointer specific to this area. If you are looking for websites audiofanzine.fr is indeed a good one, and you may also want to take a look at www.zikinf.com
(that's where I found my Funk band).
You might as well visit these two forums : http://www.totalbass.com/fr/forum/ http://forum.onlybass.com/
I'm not very familiar with them ; they're probably not as lively as talkbass but you might get something out of it anyway.
You should also look for bars that have open jam nights, I know there are some near where I live and there definitely must be some in Paris or nearby. It is a quick way to meet musicians and get that network started.
A little bit of trivia : we got our own word for jam session : "boeuf".
Welcome to France !
More websites : http://www.oazik.com/ http://www.easyzic.com/annonces-musi...pes-musiciens/