FXOSLock is a new tweak available in Cydia that allows you to change the look of your lockscreen bar. Now you can move a circular button to the right or the left.
Once you drag the slide to unlock knob over one of the buttons and release your finger, the device will either unlock if you landed on the unlock button or open the Camera application if you landed on the camera button.
FXOSLock does appear to play the iOS unlock sound whether you have the setting turned on or off in the Settings application under the Sounds preferences pane. If this becomes a problem, it’s always possible to put your iPhone into silent mode and you won’t hear the unlock sound.
FXOSLock is available right now in Cydia’s BigBoss repository for just 99¢. It supports iOS 5 and later on the iPod touch and iPhone, although the iPad is not yet supported. The tweak doesn’t come with any options to configure.