I had always wondered why it was that a new phone number was required during the sign-up process. The idea of having 1 number which can forward calls to all of your devices (landlines, cellphones, etc.) is great, but my best guess (not related to technology) is that people are “philosophically opposed” to changing their main phone number. If Google can find a way to port the other Voice features to this setup it would remove a significant barrier to widespread adoption. That said, if anyone has info on why a separate number is required to access all of the Google Voice features, please let me know.