[Confused]

I'm going on a cruise that starts in Rome, bounces around the surrounding areas and finishes in Venice. I'm looking for a data only plan that can be used in all of the areas that I'm visiting.

The ports that I'm going to are:

Rome/Civitavecchia, Italy
Bonifacio, Corsica
Cagliari, Sardinia
Trapani/Segesta Sicily
Palermo, Sicily
Taormina, Sicily
Valletta, Malta
Dubrovnik, Croatia
Split, Croatia
Venice, Italy

Is there one provider that covers all of these areas, or is there a plan that lets me use whatever network is available no matter where I go?

I have an unlocked Motorola Atrix that uses WCDMA 850/1900/2100, GSM 850/900/1800/1900. Will I be able to use this phone for 3G service?

Or, how available is free Wi-Fi? I know here in the states, I can usually find an open wifi network at any coffee shop and some resturants. Is it easy to find an open network in these places?

Thanks,
B