thanks harakiri, will definitely look into that. (Or this: )
http://www.amazon.com/Cradlepoint-CT...1103509&sr=8-2
This way my wife would be able to access the net with her little Asus netbook, too. I'm not sure how things work here in CZ, though: I don't know if we can buy a pay-as-you-go dataplan with a USB modem or not; will look into it...