MOUNTAIN VIEW, Calif. – As if the voice market wasn’t crowded or confusing enough, Google Inc. yesterday launched Google Talk, a downloadable Windows application that enables its Gmail users to quickly and easily talk or IM with their friends for free. Google Talk is not voice in the way that carriers such as Bell or Rogers or Shaw or Cogeco or Primus offer it. Those carriers offer voice service the way most people use it – on the phone. Google Talk is chatting via computer "Google Talk further enriches our users' communications experience, whether they choose to communicate via email,...