This one is interesting. I don't know if you watch commercial  ads in super bowl 2007. Doritos  "Crash the super bowl". This ad was created on a budget of 12 u.s dollar by amateur admaker. My guess that $12 he spend it to buy 3 bag of doritos. Each bag cost $3.5 

1. for him
1. for her
1. for camera men.

The romantic tale of two doritos lovers who meet on the street beat more than 1000 other homemade ads to air before the super bowl huge audience in february. 
I would guess that this amateur admaker got big bucks from Doritos company. He just invest $ 12, but in return he hit the lottery.
Marketing mission accomplished. 

we are in last day of 2007. i don't know if you agree with me if this one the best ads for 2007.