Another Google Voice Feature - Continuing Conversation on Another Phone

Google Voice has a convenient feature to allow the user to switch phones during a conversation.  Say you have answered whoever called you on your computer headset and you were just about to leave to run some errands, but want to continue the conversation as you head out the door.  

Merely press the * star key while talking and your other phones will ring, say your cell phone.  The cell phone will ring, you answer it and hang up the original phone or computer and continue the conversation as you head out to run your errands.