Hi! Thank you for your questions!
- Yes, there are other people in Italy gearing up: http://forum.thethingsnetwork.org/t/rome-italy/412 and we have been contacted by people from Milan
- The TTN gateways support all the official LoRaWAN frequcenies (910, 868 and 433)
- My experience is that usually the government assigns a free frequency, you can use it for anything.