I'm a little confused about the whole WIFI/EDGE/HOTSPOTS thing with the iphone. Whats the difference between edge, and a wifi hotspot on cloud9 (or whatever its called). With data roaming turned off, can i guarentee i will not be charged for using the internet when i connect to a random wirless network that lets me? And what are the names of the free cloud 9 hotspots we can use? do the routers have a generic name or not? And is it possible to use the net when not near a hotspot and will it cost me anything? Thanks for any advice.