I've had Guitar Hero for a few months, and the whammy bar finally pooped out on me. Well, it still works, but I have to "reset" the bar everytime I use it. Like, I press it down, and it stays down, so I have to pull it back up again.
The Guitar Hero documents that came with the game warned me that the bar would break with excessive use. That's so lame.
I'm sad. Maybe I'll save up my money and buy that expensive, yet pretty, wireless one from RedOctane.