I saw an article and downloaded it last night. Appears to work over wifi or without, so there is someone to chat with (since pretty much everybody has a data signal that is using it). They also have two channels to choose from: "Everybody" and "Nearby". Everybody is just a meaningless fast moving stream of randoms talking in such volume that you can't have a convoy, while selecting "Nearby" just says "one person chatting", which is me, since there is nobody talking in the stream. Clever approach though, in both having a 'global' channel and the ability to work via traditional wifi and cellular signal as a default. This lets people actually talk to each other right off the bat and use the app not matter where they are, -even if they are just checking it out for fun.