Google Voice integration comes to Gmail

Google Voice is one of those services you wonder how you have ever lived without before using them. Now you can make voice calls directly from Gmail using your computer’s microphone and speakers, as well as video calls if you have a webcam. Calls to and from the US and Canada are currently free and international rates start at 2¢ per minute. Call quality is reported to be very good and on par with Skype. No Google Voice account is required to use the service, although if you have one (and you should!), it will display your GV number during outbound calls and allow you to receive calls right within Gmail if you choose.

Sources: SlashGear, The Official Gmail Blog