Airbnb is a travel phenomenon. Kiwis have proved keen to sign on, either by offering their homes to overseas travellers though the website, or booking accommodation for their travels in peoples' homes rather than hostels and hotels. It's a handy site for people wanting to make some cash from their spare rooms. But how does Airbnb ensure the safety of its hosts and travellers? We also talk to Laura Tulloch who runs a facebook page and support network for New Zealanders who are opening up their homes to visitors under the Airbnb umbrella.