This gives hope to the third world where a lot of our old non-smartphones are ending up. In fact this reminds me of Mexapixel Microscopy that can possibly have numerous applications.
There was an interesting presentation recently in the Future of Wireless Conference that was very well received and had people discussing it on twitter and in the event. Its embedded below (download from slideshare)
Do you have any more ideas or information on this topic? Please feel free to share in the comments.