Official Google Blog: Talk face-to-face right from within Gmail
wow its great to know that now you can do video chat using Gmail.
even if you don't have a web cam Google will help you buy with 30% off and of course free shipping as well with its collaboration with buy.com.
you can pay them in few click away using Google Checkout.
but currently video chat is not available for Linux user.
using Gmail video chat , look and sound best with best audio sound and video quality.
how to get started:
1. Download and install Gmail voice and video plug-in
2. sign in you Gmail account
3.select a contact and click on camera option which appear next to the particular person's contact name.
4. you can make video calls along video calls.
use it once, then you will love to invite more of your friends to Gmail Video chat.