Information Research Weblog

There's a good review of the convergence of mobile telephony and Internet telephony on the Wi-fi Planet site.

"Convergence also promises to deliver voice or data over the type of network that is cheaper, more optimal and, of course, available at a particular moment.

For instance, say you're talking to a friend on your smartphone while walking down the street. Enter a cafe with a Wi-Fi network, mid-call, and your mobile handset automatically switches to a VoWLAN connection, saving precious minutes and money in the process.

A number of companies and organizations have announced plans to help make Wi-Fi/cellular convergence and straight VoIP phone calling from handhelds more widespread."