Using a cell phone camera chip for medical diagnosis

Saw an interesting piece on using a digital camera chip for remote medical diagnosis. It's a way of getting microscopic analysis without a microscope - the sample just sits on top of the camera sensor chip. The shadows the specimen casts can provide enough information for clinical diagnosis. You can see it online at
http://science.discovery.com/videos/brink-package-micro-cell-phone.html
or read about it at
http://www.photonics.com/Content/ReadArticle.aspx?ArticleID=36533

This large file is one of their academic papers:
http://www.ieee.org/organizations/pubs/newsletters/leos/oct08/22leos05.pdf

and an example of using the technology at
http://www.pnas.org/content/105/31/10670.full