Google has introduced Gmail voice and video chat, which lets you have free voice and video conversations right from within Gmail.

Many of us have already been using Gmail’s voicemail feature to send them to email ids (very useful), and this voice and video chat will make it even better.

Checkout these Google blog posts for more details:

http://gmailblog.blogspot.com/2008/11/say-hello-to-gmail-voice-and-video-chat.html

http://googleblog.blogspot.com/2008/11/talk-face-to-face-right-from-within.html