Do you have an ongoing issue with accidentally launching the Lock Screen camera in iOS 5? If so, then perhaps this is the jailbreak tweak for you.
LockscreenSureCam is a tweak that prompts you before launching the Camera on your Lock Screen. I don't know anyone who's ever had a problem with this, but I'm sure someone is out there that does. If that's you, then check inside for a brief video walkthrough.