Rumors have been buzzing about since June, but Google just made it official -- the company's baking Google Voice calls right into Gmail today. Like the Google Chat text, voice and video chat integrated into the web-based email client last year, full phone calls will also be an option. Google's demoing the service for us in San Francisco this morning, and it's looking like it's not free, but fairly cheap -- a product manager just called Paris for $0.02 a minute. Incoming calls pop up as a chat window in Gmail (and ring your Google Voice-equipped phones simultaneously) and you press a "Call phone" button that appears near the top of the Chat window to send an outbound call, at which point a dialer appears where you can copy/paste numbers or tap them in manua
