Wow, what a dilema. Should I lie to my wife AND break a promise for a blackberry? Can you even look at yourself in the mirror? My suggestion, since you asked for them, is to spend the whole day tracking your blackberry via fedex, "crafting" your schedule in order to obtain the unit. THEN, since you will be so happy that you have it you will of course want to start using it right away. SO, make up some other excuses why you can't spend time with your wife so you can get a soar neck staring at the device all day. Sounds like a real good idea to me.
Or, you could just be a man and live up to your promise to spend the day with your wife.