I know I can dial the the Google Voice web interface, but obviously I'm not always near my computer when I want to call someone. Is there a way to make any call I dial go out with my Google Voice number? This primary benefit of this is that people who receive my calls would see my Google Voice number displayed, rather than my mobile number.
Note: I saw this today, but I'd like to do it without losing functionality. I just have a regular mobile phone, not a smartphone.