Google never ceases to amaze. They have an uncanny ability to take something complex (in this case, having to manage voicemail on multiple phones) and make it incredibly simple.
I will most certainly be getting this when it's available. You can too. The video explains it.
Now if they could just do the same thing for Facebook, Twitter, email, and IM. Wait, did I just come up with an idea for a groundbreaking technology? Too bad I know nothing about programming.