Hi marving! You're not far from where I am (about 20 km the other side of Les Ulis). Do take advantage of the free French lessons that are part of your "contrat d'integration". They aren't the greatest classes, but you can't beat the price. Speaking passable French is the first requirement, it seems, for finding any sort of job. There are also some volunteer groups in the area that offer very reasonably priced French classes in small groups.
I was shopping yesterday over in Bretigny and noticed that lots of the shops are starting to post signs looking for temporary help through the holidays. They are only CDDs (limited term contracts) but it's how most locals get started. These jobs never hit the ANPE or other posting boards. They just stick a sign in the shop window and find whoever wanders by.
Or find one of the "welcome clubs" in the area (there is an Accueil Paliseau and the AVF at Bures-Gif-Orsay - I think there may be something at Massy, too). These groups often have French language circles where you can practice your language skills, and sometimes they can help you find a job as your language skills progress.
Two months isn't long, and in France job hunting inevitably takes much longer than that. (Not to mention a certain number of "Bad France Days" in the bargain.)