Source: http://gizmodo.com/5621146/soon-youll-be-able-to-make-phone-calls-from-your-gmail-inbox
It seems that Google might have a lovely new offering for us soon: A web-based VoIP client. According to CNET, we'll be able to access this client through our Gmail inboxes to make and take calls on the spot.
This web-based VoIP client appears to be the reason Google acquired Gizmo5—a company who offered a similar product—and could make life just a bit simpler by letting us use the Google Talk box in our web-based Gmail client to make calls.
Google has not given any further information regarding this service at this point, but I just hope they hurry up and release it. [CNET]