More grief for the traditional phone companies as Google launches Voice, a service that lets you make a call from a PC to a traditional phone number at a low rate.

Google Voice has added applications for Blackberry and Android phones which give you the ability to call and text with your voice number, voicemail transcriptions, and cheap international calls.

While only available to US consumers currently, and a select few at that, the move is an ominous step into Skype’s territory.

As traditional telcos grapple with their transition to the digital age, the search giant is set to announce its new Google Voice today. Voice will offer free domestic VoIP calls, a single number that rings on any phone you own, and transcribes voice mail - which will be placed, alongside email, in a single inbox, accessible from anywhere.