Google's latest free service, Google Voice, is being rolled out to the general public after beta-testing among an initial audience of former GrandCentral users.

Google Voice offers users a single number for their cell, home phone, office phone and more to ring on. Other features include free voicemail, call forwarding and conference calling.

It also offers free unlimited long distance calling in the United States and cheap calls overseas. This could be very beneficial for someone with a monopoly landline who has to pay for expensive long distance calls.

With the voicemail feature, you're able to listen in as voicemails are being left and pick up in the middle of the call -- just like you would with an answering machine. You can also have voicemails automatically converted into a text message!

This is a lot of functionality wrapped up into one package.

So how do you get it? Go to Google.com/Voice to watch an introductory video and Google.com/VoiceInvite to get in the queue as new users are added.