Google Voice, previously Grand Central, is now open to the public. Prior to today the service was ‘invite only’, requiring users to invite their friends. Since Google bought Grand Central the service has added new features, such as the ability to make domestic calls completely free and transcribe voicemails to email.
The core offering of Grand Central (I signed up years ago) was to provide a single number that directed all your calls to the home, cell or office phone. A simple and slick web interface allowed new numbers to be added and even ring back tones were allowed until the copyright issues reared its ugly head. Users pick a phone number when they sign up. According to Google Voice’s head honcho and founder of Grand Central, Craig Walker (he reportedly sold it for $50 million) the service has 1 million subscribers.