Gmail user had now new thing to enjoy, gmail let you call multiple calls at a time. You can now call more than one use through gmail.User can recive and call mutiple call by putting one call on hold. Gmail allow to switch between the call by pressing of resume for the call you want talk of. This feature work for all video, voice and phone calls across the us and canada. But restriction is that only two physcial phones are allowed.
This feature is quite handy for the gmail user in us and canada but user from other country still have to wait though it more than 1 year has been passed of introduction of phone system in gmail.
Via Gmail blog