About 22 months ago, Google launched a voice and video chat feature within Gmail, allowing many people to have live, face-to-face conversations with their friends and colleagues. Now, a few more folks - Linux users - will finally be permitted to take advantage of it, too. Late yesterday, Tristan Schmelcher, a software engineer, wrote on the Gmail Blog , "If you've been wanting to use voice and video chat on Linux (our top video chat request),