Widget Locker – A powerful lock screen replacement
What can I expect from Widget Locker?
Widget Locker gives everyone the ability to place their favorite widgets on your Android lock screen, but it also presents us with other powerful customizations that include:
Accessible or hidden notification bar
Alternate wallpaper from your home screen
Back button, home button, camera button, and trackball unlock methods
Control of slider haptic feedback, lock, and unlock sounds
Custom shortcuts, screen timeouts, and multiple sliders
Portrait or Landscape mode
Voice Actions, HTC weather animations, and access to multitasking applications such as Power Strip and Quick Desk, all on your lock screen



Edit:
http://htcdev.net/topic/192789-app-revi ... placement/