Version 1.2 of rWallpaper is pretty cool! When you open the app…you are now able to choose how often you would like the Wallpaper to change. It starts at every ten minutes and goes by one minute intervals up to 60 minutes. So, your Wallpaper can change every ten minute up to once an hour. I think this is a great idea and it should keep it from draining your battery as quickly as it did in the previous version. rWallpaper is available through the Skrew source.