Mobile developer Fingerfunk has created a line of very cool T-shirts with a Giger-esque design that comes to life through Augmented Reality. You can see a demonstration of the T-shirt in action in the video below.
The tracking image and T-shirt can be acquired at the developers website here. The Android app can be downloaded for free here. An iOS version has been submitted and is waiting for approval. More information on the design and plenty of behind-the-scenes images can be found here.
Update 29/08/12: The iOS version is now available here.
Edit-- basically like this.
You wear an ipad on your back and another on your chest, over the ipad is a shirt with a ragged bloody hole front and back.
Then they connect to each other via facetime.
Edit-- so is there no iOS app for this yet? That video is from late May and it says the iOS app is "coming soon".