Just wanted to provide some updated info on the current Wind Plans. I bought a mobile Wifi Hotspot from the Wind store for about 48 Euros. I went to the Tre store first, and they didn't have Internet Keys or Hotspot Data only plans available for Prepaid. Overall I'm very happy with Wind and the data speeds they provide with UTMS+. About 5 Mbps down and 2 Mbps. Plenty to skype with video, internet phone calls, and video streaming!
So the current Internet plans are here:
http://www.wind.it/it/privati/tariff...ioni/internet/
6 GB of Data for 14 Euro
12 GB for 19 Euro.
*Note*
One important thing to note, if you use all the data and want to renew your data before the 30 days, I could not use the RENNOVA SI sent to 4033. I tried this many times, and it looks like it's going to work because you get a confirmation email saying to wait up to 48 hours for re-activation. Nothing happens though. I ended up registering on their website renewing online and it worked right away. Also the plan's details on the website says you can send "RESTART 12GB" to 4033. I tried this and it didn't work for me.
Hope that info helps to other travelers!
Ciao!