I've been watching this and their related ICQ SIM. United Mobile also charges a connection charge and you should factor this in. Later this summer, Vodafone is extending its Passport service to data. 12 euros a day gets you unlimited roaming in most EU countries. It is cheaper for unlimited in the home country (obviously). This is cheaper than hotel broadband and you can take it on the go with you if you've got a 3g phone which can also be tethered.