Apparently, according to iVillage Health, that is what is happening in Portland, Oregon. "Citizen, a company in Portland, Ore., is doing. The project, C3PO, which stands for Citizen Evolutionary Process Organism, asks employees to track their food, sleep and exercise and upload it to a central server within the company.It then compares that data against time tracking applications to find out how what you do on your own time affects your efficiency at the office.According to Wired, the express purpose of this data-crunching endeavor is to “show employees how they can improve their work through better personal habits.”" read more 
Is this a good idea or not? Would you participate in something like this?