Prepaid DATA in Italy

[Albo]

Thanks Effendi,
great job this list! Saved me at least a week in the price labyrinths of all these companies.
Here a few updates I found:
-Wind: All Internet No Stop options are limited to mobile surfing, for USB keys only Mega Unlimited or the time-billed Mega Ore option
-MTV Mobile: All Prepaid options have an activation fee of € 5.00
-COOP.voce: All Data volume options are restricted to mobile surfing, for USB keys only time billed options

Since my restriction was data volume rate for USB keys and no activation fee, I ended up with Vodafone, which strange enough is the only company offering that.
Cheers
Albo