I actually think it would be a great value add to compliment the service provided, although not sure I would be willing to pay any extra for it. I do not need transcription service (although I do enjoy Google Voice when they get it right), but visual voicemail would be nice and with an app for both Android and iPhone very easy to check.

The current voicemail system just works which is great, but I guess I assume a VoIP voicemail system should be more feature rich than a traditional Bell system voicemail (.wav file aside).