Interesting move made by Skype by launching a new service - PocketSkype - which allows using the PDA as a phone via WiFi. I think this is very important strategic move as it opens new opportunities and constitutes a real threat to the classic mobile telephony. It is still in an incipient phase and the service is designed only for handheld computers running Microsoft's PocketPC operating system - but hey, there's plenty of room for innovative choices.

Quick reminder - Skype is a VoIP company providing free peer-to-peer phone calls via desktops. Apparently there are about 10 mill. people worldwide using it.