These are the top social networks in France:
1. Copains d’Avant: 49% of French Internet users do have an account in this network.
2. Windows Live Messenger: 46%
3. Facebook: 37%
4. Trombi: 19%
5. MySpace, Skyrock, Viadeo: 8%
8. Hi5, Twitter: 5%
Twitter is a very interesting case. Few people do have an account but it has grown a lot in terms of public knowledge (notoriété): from 28% in Spring 2009 to 63% in Autumn 2009. Also to note that Facebook is pretty much known by everybody in France, even net users older thatn 65 do know it.