An interesting article from Information Week discusses Americans growing demand for full-service wi-fi on their smartphones. Instead of using their data plans, many mobile browsers are happy to use wi-fi, and in fact most would love to save money on their monthly service bills by using either public or private wi-fi networks. Others felt that the wi-fi service was faster than surfing via their mobile provider.
Again, make sure when you do access wi-fi that you do it safely and legally. On unencrypted networks be very wary of using any service that requires logging in with your password–even streaming sites like Pandora or your Facebook page. Your mobile web service may be the right choice for applications that require more security.