Wi-Fi vs 3G
Please consider :
Wi-Fi Hotspots Get a Second Wind
http://www.pcworld.com/article/164666/wifi_hotspots_get_a_second_wind.html
We had been hearing this debate since we started to develop FirstSpot in 2002. The short answer is that Wi-Fi Hotspot will always have its place (e.g. data roaming situation, a lot of people in one small place, basement conference centers). After the more ambitious (but sometimes flawed, especially if it doesn’t have a solid financial backing) municipal wireless projects taper off, hotspot operators are more pragmatic about what Wi-Fi Hotspot can do. We see that as a healthly long-term development for the hotspot market.