One cool way to use the new Google Voice integrated with Gmail is to transfer cellphone calls to your computer and save on minutes.
First, be sure to add your Gmail Chat account as a number that can be reached via Google Voice.
Then, when you’re in the midst of a call, hit the * key to transfer it to another Google Voice number. If your Gmail is open, your inbox will start ringing. Pick up the call in your Gmail and hang up your cellphone.
Blamo! Instant minute savings.