While the idea sounds fantastic - the one major hesitation I have is how difficult will it be to get customer support from Google? I've been waiting for this feature for quite sometime, but now I'm seriously reconsidering. Despite the gripes anyone might have with their existing wireless carrier's customer service.. you can get someone on the other end of phone 100% of the time to help you resolve problems. Let's face it, your mobile number these days is probably significantly more involved in your day to day life than your landline (if you even still have one of those). I think twice before placing my mobile number on any provider.