Engadget - Sometimes the X-Prize foundation gets a little ahead of itself. We couldn't get a private mission to the moon off the ground and apparently we can't built a tricorder either. But, we can take baby steps. Presumably that's what the newest X Challenge is all about. The group has teamed up with a certain Finnish phone maker to introduce the Nokia Sensing X Challenge. Rather than dive head first into Star Trek tech, the two are offering $2.25 million to further the development of health sensors and their associated technology.