Garage Battle,
I am curious, were the bluetooth connectivity issues ever traced to either the tablet or the phone? Some phones are known to have flaky bluetooth implementations. I hesitate to risk being labeled a Nokia shill and suggest trying a Nokia phone, but it would at least make sense that Nokia would perform more compatibility testing with their own phones. As for the 3G connectivity issues with your Razr, that is definitely the phone's problem. It is a long shot, but perhaps a firmware update might help?

On the other hand, what are the current limits of syncing of phone & tablet? My impression at this point is that the tablet would have to continually poll the phone for updates, creating time gaps when the devices are not in sync. Ideally, a daemon would run on each device and only communicate & update as needed, but instantly. With this seemless & invisible interaction the user would be able to use whichever device is on-hand or simplest to navigate.