I doubt prices of bikes will drop much, they may drop a little bit, but i doubt they would because of fuel.
Think about it, if you where a big bike name (e.g Santacruz, Orange, GT, Specialised, Giant, Norco, Kona, ect.) would you even CARE what fuel prices would be doing? I dont think major company's would lower there income just so people dont have to pay so much to fuel up there cars.
As a person mentioned in this post, nearly every single person has an old bike, and i dont see why they would go out and buy a expensive Off road bike. (to the public over $1000 is very expensive for a bicycle)
So no i dont reckon they will drop in prices due to the fuel crisis.
Just my thoughts.