I would seriously consider an umlimited 3G plan, if it wasn't for the fact that being located in Europe I'm mostly in some other country if I'm not in my own town.. and the mobile phone data plans switches to highway robbery mode as soon as you cross a border. At least for now (the EU commision smashed down on the voice roaming rates recently, hopefully they'll go for the data part too at some stage). wi-fi hotspots seem to be the only option for now.