The number of mobile VoIP users is set to grow to 100 million in Europe and the USA in the next two years.

Skype this week will start offering plans to let users call international wireline and wireless phones at significantly lower rates than its current pay-as-you-go services.

Skype and Nokia have released a new Skype client for the Symbian mobile OS.

Skype has released the latest version of its application for the iPhone, adding new features and fixing a couple of annoying bugs that hung up calls.

AT&T reversed course today, announcing that it would "take the steps necessary" so iPhone owners could run voice-over-Internet Protocol (VoIP) applications, presumably including Google Voice and Skype.

Skype, the Internet telephony provider, Thursday urged regulators in Europe to intervene to ensure that users aren't blocked from using their mobile phones to access much cheaper phone calls via the Internet.

Google Voice is headed for Blackberry and Android handsets, potentially turning smart phones into your hub for managing voice mail, all your contacts, and making low-cost phone calls, according to reports surfacing on the Web today.

Voice-over-IP applications will be forbidden from Microsoft's Windows MarketPlace for Mobile store, along with programs that are larger than 10MB or that change the default browser on a device.