Instructions on how to set a transparent lockscreen wallpaper can be found here:
http://phone7.wordpress.com/2010/12/07/creating-transparent-lockscreen-wallpapers-for-wp7/
Wallpaper Gallery:
http://www.transparentwallpaper.net
Video Tutorial on creating your own:
http://www.youtube.com/watch?v=JBUdTQbVVpY
Figured I'd pay homage to the inevitable flashlight app :)
Feel free to follow me on Twitter - @keyboardP
