Okay, I'm a little torn on this one. The MirrorCase, from RHP MultiMedia (like most technology) can be used for good or evil. What it does is redirect the camera on your iPhone (or soon, iPad) to face forward when your iOS device is held flat.
As the name implies, through the clever use of mirrors and a custom app that reorients the image so it's not flipped/reversed, you can secretly capture video and photos without telegraphing what you're doing. This could be useful for recording a class lecture or presentation, but it could also be used for illicit purposes (in a locker room, for example, where many camera phones are prohibited). The app's stealth mode doesn't help ease my trepidation, as it hides the video screen and replaces it with fake app buttons.
Again, the MirrorCase can be used for good or bad purposes. Here's hoping you use it for good things! The MirrorCase will be available in March and I hope to be able to review it then to see just how practical it is.