Animated Nebula background with iphone icons falling and fading into the dark for Winterboard.
Winterboard for iphone, ifunbox for pc or just ssh into your iphone.
Extract theme from compressed file. Then copy theme into your iphone with ssh or ifunbox to the themes directory.
You could also mod it to make the matching animated wallpaper. Just copy LockBackground.html and rename to Wallpaper.html . Enjoy.
Note there is supposed to be a time field in the lockscreen. You may also take it out. Use the clockhide in Winterboard.
Use these files at your own risk!