Sliding Doors…. I recently got a Nokia Lumia 800, the unlock screen has no visual queues as to what to do, so I took a photo of a shuttered shop and cropped it via the ‘set wallpaper’ tool, and now it’s easy to remember to pull the shutter up :)
So just take a photo of a shutter or blind etc and your unlock screen is 100% more fun.
or use mine…
http://www.flickr.com/photos/cmmorrison/6377513697/in/photostream