I have a holiday in Italy coming up.  I am thinking of using an Ipad 3G so I can run the Tom Tom sat nav plus to load up all those junky travel guides that drag you down in weight.  I have two questions: Will a NZ Ipad 3G work in Italy if I get a local sim card, and secondly, is the idea of using the Tom Tom sat nav system actually workable?  Appreciate any help.