Yes and no. Whether the phone is roaming or not, the cost of data is the very same (marginally, zero). The industry a s a whole has a major issue if they think they can sell data for 10c/Mb. What I'm saying is that this is chocking a potentially huge industry, where only the applications that transmit ridiculously little data (by today's standards) can be made economically. My feeling is also that the overhead of switching and accounting for 100 bytes or one gigabyte is very very similar....