I want a mobile app that syncs with your calendar so it knows where you’re supposed to be and what their cell phone number is. If you’re running late, you hit the “running late” icon and it sends a text message to the person you’re meeting saying you’re behind schedule. You can set a default increment of time/message (“On my way, see you in 5”) or select from a range of pre-defined or user-defined messages (“Got caught in a meeting, on my way now”; “Trying to park, there in 2”).