I was unaware of this kind of technology (I am not so much into odor stuff, maybe I should contact my friends in this domain...). I stumbled across thisscent-based alarm clock.

"This clock is essential to a refreshing morning. It begins emitting a fresh morning fragrance 30 minutes prior to the alarm to create an atmosphere ideally suited to waking. Two fragrances—lemon mint and eucalyptus mint—evoke a morning freshness."

Well, just 2 fragrances... it's not enough. I think some pranksters might hack this in a nice way :)