If you wish internet then many sites offer WiFi. Yes, it is not cheap but if you note the Company providing it, you will probably find it is the same in a number of sites, so the same card will work in a number of locations. Alternatively, find a local cafe offering the service.
Dongles usually cost with roaming charges but ohters can give more information.
Sorry, but if you feel you cannot survive without staying in daily internet contact, then posibly travelling abroad is not the best for you.