Push-to-talk with Loudtalks Lite for Windows Mobile
Those looking for a good push-to-talk solution for Windows Mobile may want to check out Loudtalks Lite. Loudtalks allows users to communicate instantly over 3G, Edge, and WiFi. It also supports “one to many” functionality that allows you to message multiple people simultaneously. Loudtalks Lite is free to use for individuals and will stay that way forever. No word yet on whether or not the developer will be creating a Windows Phone 7 port (or if it is even possible).