They will launch their service tomorrow.
Prepaid :
http://www.virginmobile.fr/lv_cartes_prepayes.php
Prepaid fee :
sim card : 15? (with 5? inclued)
Top-up validity : 3month call + 6 month incoming only
Top-up : 10? minimum, you can top-up on internet
National sms : 10 cents
National call : 0.42?/min (second from the first second)
National GPRS/EDGE : 6cents/10KB
If you choose the 30Days validity when you top-up (instead of the default 3month)
you get lower fee (0.38?/min for 15?, 0,27 for 20?)
International call from france (60/1)
Call to zone1 (western europe) :
0.7?/min
Call to zone2 (eastern europe, maghreb, north america) :
0.8?/min
Call to zone3 & specific destinations :
1,55?/min
I suggest you to use a callback service like gsm2world.
SMS to international : 0.15?
Everything :
http://www.virginmobile.fr/download/fiche_..._2006-03-15.pdf
If you don't understand something ask me.
List of virgin megastore (i don't know if they will sell sim card there, but i think so) :
http://www.virginmegastore.fr/default2.asp.../f02_france.asp