Official Google Blog: Google Voice, explained

Google Voice is about giving you more control over your communications, through dozens of features â€" ranging from call screening to voicemail transcription to the ability to send and receive SMS by email. ...<br />Extracted from: <a href='http://googleblog.blogspot.com/2010/02/google-voice-explained.html'>http://googleblog.blogspot.com/2010/02/google-voice-explained.html</a>