New app: Paying cash for your data and encouraging healthy lifestyle

In return for selling your aggregated (and supposedly anonymized) data about your healthy activity and your foursquare checkins, this app will give you cash when you do healthy things, apparently to encourage you to lead a healthier lifestyle (cash payments only available to US residents though).  Nice review of it on mashable.

This is one of the many kinds of services we are talking about in a grant application we are writing now to allow people to do this kind of thing with lifelogging data in a privacy preserving way.