I suppose via ActiveSync contact syncing that Google Voice contacts show up in your iPhone Contacts database. Which has been doable for quite some time now. But

I suppose via ActiveSync contact syncing that Google Voice contacts show up in your iPhone Contacts database. Which has been doable for quite some time now. But previously, to call one of those numbers via Google Voice you had to call it via the web, the iPhone app, or dial a special Google number first. At least to make it appear as though the number calling you is your Google Voice number. Now with Sprint, since they effectively make your GV number your phone number, you can call contacts from your iPhone Contacts and without any mumbo jumbo in between appear as though your GV number is the one calling. Because it is.