http://www.forbes.com/sites/tomiogeron/2012/12/17/burrito-bomber-drone-parachutes-carnitas-to-your-doorstep/ (the slideshow is at the bottom).
http://tacocopter.com/ (a link referenced talks about a UAV that delivers tacos!) :o
http://www.forbes.com/pictures/ehfk45ediek/aerocopter-mon-tilt-rotor-vtol/ (very interesting design here).
http://www.youtube.com/watch?feature=player_embedded&v=3lqMRHwGsRA