As Przemolog i'd like to put here italy mvno, as of today they are 9:
-Coopvoce. Code 331-1. It's necessary to subscribe coop card (supermarket). Roam Tim
www.coopvoce.it
-1mobile. Code 377-3. Only one tarif. Roam Vodafone
www.unomobile.it
-Postemobile. Code 377-1. Interesting for...post office users
Roam Vodafone .
www.postemobile.it
-Bt mobile. Code 377-7. Only for firms.
www.italia.bt.com
-Conad Insim. Code 377-9.
www.conad.it
-A-mobile. Code 32X or 38X. Powered by Wind. Roam Wind
www.auchan.it
-Telepass mobile. Code 32X or 38X (I'm not sure) roam Wind.
www.telepass.it
-Fastweb mobile. Code unknown as of today. Roam 3. Necessary to be fastweb user.
www.fastweb.it
-Mtv mobile. Roam Tim
www.fredo.it
Probably only Fw is a very mvno, most of them are not mvno
Effendi, Andrea, if I've forgot something, tell me it